// Numbas version: exam_results_page_options {"name": "Inverse operations and equations", "metadata": {"description": "", "licence": "None specified"}, "duration": 0, "percentPass": 0, "showQuestionGroupNames": false, "shuffleQuestionGroups": false, "showstudentname": true, "question_groups": [{"name": "Order of operations", "pickingStrategy": "all-ordered", "pickQuestions": 1, "questionNames": ["", "", ""], "variable_overrides": [[], [], []], "questions": [{"name": "Build algebraic expressions 1", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Martin Jones", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/145/"}], "tags": [], "metadata": {"description": "", "licence": "None specified"}, "statement": "

Write down the algebraic expression obtained when the following operations are performed on the letter $x$.

\n

Use the following symbols:

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\\[x\\rightarrow\\times\\var{c}\\rightarrow-\\var{b}\\]

", "answer": "{c}x-{b}", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": true, "singleLetterVariables": true, "allowUnknownFunctions": false, "implicitFunctionComposition": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

\\[x\\rightarrow+\\var{a}\\rightarrow\\times\\var{c}\\]

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\\[x\\rightarrow\\div\\var{d}\\rightarrow\\text{subtract from }\\var{g}\\]

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\\[x\\rightarrow\\text{subtract from }\\var{g}\\rightarrow\\text{square root}\\]

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\\[x\\rightarrow\\text{divide into }\\var{f}\\rightarrow\\text{square}\\]

", "answer": "({f}/x)^2", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": true, "singleLetterVariables": true, "allowUnknownFunctions": false, "implicitFunctionComposition": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

\\[x\\rightarrow\\text{square root}\\rightarrow\\text{divide into }\\var{f}\\]

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\\[x\\rightarrow-\\var{b}\\rightarrow\\div\\var{d}\\rightarrow\\text{square}\\]

", "answer": "((x-{b})/{d})^2", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": true, "singleLetterVariables": true, "allowUnknownFunctions": false, "implicitFunctionComposition": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

\\[x\\rightarrow\\text{square}\\rightarrow\\text{divide into }\\var{f}\\rightarrow+\\var{a}\\]

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\\[x\\rightarrow\\div\\var{d}\\rightarrow-\\var{b}\\rightarrow\\text{square root}\\]

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\\[x\\rightarrow\\times\\var{c}\\rightarrow+\\var{a}\\rightarrow\\text{divide into }\\var{f}\\]

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Select the operations required to make each of the algebraic expressions below.

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\\[x^2-\\var{b}\\]

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\\[\\var{g}-\\frac{\\var{f}}{x}\\]

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\\[\\frac{x+\\var{a}}{\\var{d}}\\]

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\\[\\frac{\\var{f}}{x^2}\\]

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\\[(\\var{c}x-\\var{b})^2\\]

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\\[\\sqrt{\\var{g}-\\var{c}x}\\]

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\\[\\var{g}-\\left(\\frac{x}{\\var{d}}\\right)^2\\]

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\\[\\frac{\\sqrt{x}+\\var{a}}{\\var{d}}\\]

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\\[\\sqrt{\\var{c}(x-\\var{b})}+\\var{a}\\]

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\\[\\var{g}-\\frac{\\frac{\\var{f}}{x}-\\var{b}}{\\var{d}}\\]

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Select the inverse of the following operations.

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What is the inverse of $+\\var{a}$ ?

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$+\\var{a}$

", "

$-\\var{a}$

", "

$\\times\\var{a}$

", "

$\\div\\var{a}$

", "

divide into $\\var{a}$

", "

subtract from $\\var{a}$

", "

square

", "

square root

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What is the inverse of $-\\var{a}$ ?

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$+\\var{a}$

", "

$-\\var{a}$

", "

$\\times\\var{a}$

", "

$\\div\\var{a}$

", "

divide into $\\var{a}$

", "

subtract from $\\var{a}$

", "

square

", "

square root

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What is the inverse of $\\times\\var{a}$ ?

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$+\\var{a}$

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$-\\var{a}$

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$\\times\\var{a}$

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$\\div\\var{a}$

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divide into $\\var{a}$

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subtract from $\\var{a}$

", "

square

", "

square root

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What is the inverse of $\\div\\var{a}$ ?

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$+\\var{a}$

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$-\\var{a}$

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$\\times\\var{a}$

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$\\div\\var{a}$

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divide into $\\var{a}$

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subtract from $\\var{a}$

", "

square

", "

square root

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What is the inverse of subtract from $\\var{a}$ ?

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$+\\var{a}$

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$-\\var{a}$

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$\\times\\var{a}$

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$\\div\\var{a}$

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divide into $\\var{a}$

", "

subtract from $\\var{a}$

", "

square

", "

square root

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What is the inverse of divide into $\\var{a}$ ?

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$+\\var{a}$

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$-\\var{a}$

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$\\times\\var{a}$

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$\\div\\var{a}$

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divide into $\\var{a}$

", "

subtract from $\\var{a}$

", "

square

", "

square root

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What is the inverse of square?

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$+\\var{a}$

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$-\\var{a}$

", "

$\\times\\var{a}$

", "

$\\div\\var{a}$

", "

divide into $\\var{a}$

", "

subtract from $\\var{a}$

", "

square

", "

square root

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What is the inverse of square root?

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$+\\var{a}$

", "

$-\\var{a}$

", "

$\\times\\var{a}$

", "

$\\div\\var{a}$

", "

divide into $\\var{a}$

", "

subtract from $\\var{a}$

", "

square

", "

square root

"], "variableReplacementStrategy": "originalfirst", "minMarks": 0}]}]}, {"name": "2-step equations", "pickingStrategy": "all-ordered", "pickQuestions": 1, "questionNames": ["", "", "", "", "", "", "", "", "", ""], "variable_overrides": [[], [], [], [], [], [], [], [], [], []], "questions": [{"name": "2-step equation 1", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Martin Jones", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/145/"}], "tags": [], "metadata": {"description": "", "licence": "None specified"}, "statement": "

Solve the equation

\n

\\[\\var{c}(x+\\var{a})=\\var{n}\\]

", "advice": "", "rulesets": {}, "variables": {"a": {"name": "a", "group": "Ungrouped variables", "definition": "random(1..9)", "description": "", "templateType": "anything"}, "f": {"name": "f", "group": "Ungrouped variables", "definition": "random(12,15,18,20,24,30,32,36)", "description": "", "templateType": "anything"}, "n": {"name": "n", "group": "Ungrouped variables", "definition": "c*(x+b)", "description": "", "templateType": "anything"}, "g": {"name": "g", "group": "Ungrouped variables", "definition": "random(5..15 except [a,b,c,d])", "description": "", "templateType": "anything"}, "x": {"name": "x", "group": "Ungrouped variables", "definition": "random(-5..15 except 0)", "description": "", "templateType": "anything"}, "c": {"name": "c", "group": "Ungrouped variables", "definition": "random(2..9 except [a,b])", "description": "", "templateType": "anything"}, "b": {"name": "b", "group": "Ungrouped variables", "definition": "random(1..9 except a)", "description": "", "templateType": "anything"}, "d": {"name": "d", "group": "Ungrouped variables", "definition": "random(2..9 except [a,b,c])", "description": "", "templateType": "anything"}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["f", "x", "b", "a", "d", "n", "g", "c"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

What is the first inverse operation?

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$-\\var{a}$

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$\\div\\var{c}$

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Step 1:

\n

[[0]]$=\\;$[[1]]

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What is the second inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["

$-\\var{a}$

", "

$\\div\\var{c}$

"], "matrix": [1, 0], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 2:

\n

[[0]]$=\\;$[[1]]

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Solve the equation

\n

\\[x^2-\\var{b}=\\var{n}\\]

", "advice": "", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"x": {"name": "x", "group": "Ungrouped variables", "definition": "random(1..15)", "description": "", "templateType": "anything", "can_override": false}, "n": {"name": "n", "group": "Ungrouped variables", "definition": "x^2-b", "description": "", "templateType": "anything", "can_override": false}, "b": {"name": "b", "group": "Ungrouped variables", "definition": "random(1..9)", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["b", "n", "x"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

What is the first inverse operation?

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Perform the operation:

\n

[[0]]$=\\;$[[1]]

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What is the first inverse operation?

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Perform the operation:

\n

$x=\\;$[[0]] or [[1]]

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Solve the equation

\n

\\[\\var{g}-\\var{c}x=\\var{n}\\]

", "advice": "", "rulesets": {}, "variables": {"a": {"name": "a", "group": "Ungrouped variables", "definition": "random(1..9)", "description": "", "templateType": "anything"}, "b": {"name": "b", "group": "Ungrouped variables", "definition": "random(1..9 except a)", "description": "", "templateType": "anything"}, "c": {"name": "c", "group": "Ungrouped variables", "definition": "random(2..9 except [a,b])", "description": "", "templateType": "anything"}, "d": {"name": "d", "group": "Ungrouped variables", "definition": "random(2..9 except [a,b,c])", "description": "", "templateType": "anything"}, "g": {"name": "g", "group": "Ungrouped variables", "definition": "random(5..15 except [a,b,c,d])", "description": "", "templateType": "anything"}, "f": {"name": "f", "group": "Ungrouped variables", "definition": "random(12,15,18,20,24,30,32,36)", "description": "", "templateType": "anything"}, "x": {"name": "x", "group": "Ungrouped variables", "definition": "random(-5..5 except 0)", "description": "", "templateType": "anything"}, "n": {"name": "n", "group": "Ungrouped variables", "definition": "g-c*x", "description": "", "templateType": "anything"}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["a", "b", "c", "d", "g", "f", "x", "n"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

What is the first inverse operation?

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subtract from $\\var{g}$

", "

$\\div\\var{c}$

"], "matrix": [1, 0], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 1:

\n

[[0]]$=\\;$[[1]]

", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{c}x", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{g}-{n}", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": []}], "sortAnswers": false}, {"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

What is the second inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["

subtract from $\\var{g}$

", "

$\\div\\var{c}$

"], "matrix": [0, 1], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 2:

\n

[[0]]$=\\;$[[1]]

", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "x", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{x}", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": []}], "sortAnswers": false}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}, {"name": "2-step equation 4", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Martin Jones", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/145/"}], "tags": [], "metadata": {"description": "", "licence": "None specified"}, "statement": "

Solve the equation

\n

\\[\\frac{x}{\\var{d}}+\\var{a}=\\var{n}\\]

", "advice": "", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"n": {"name": "n", "group": "Ungrouped variables", "definition": "random(5..15)", "description": "", "templateType": "anything", "can_override": false}, "c": {"name": "c", "group": "Ungrouped variables", "definition": "random(2..9 except [a,b])", "description": "", "templateType": "anything", "can_override": false}, "x": {"name": "x", "group": "Ungrouped variables", "definition": "d*(n-a)", "description": "", "templateType": "anything", "can_override": false}, "d": {"name": "d", "group": "Ungrouped variables", "definition": "random(2..5)", "description": "", "templateType": "anything", "can_override": false}, "a": {"name": "a", "group": "Ungrouped variables", "definition": "random(1..9)", "description": "", "templateType": "anything", "can_override": false}, "b": {"name": "b", "group": "Ungrouped variables", "definition": "random(1..9 except a)", "description": "", "templateType": "anything", "can_override": false}, "g": {"name": "g", "group": "Ungrouped variables", "definition": "random(5..15 except [a,b,c,d])", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["x", "n", "g", "a", "c", "b", "d"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

What is the first inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["

$-\\var{a}$

", "

$\\times\\var{d}$

"], "matrix": [1, 0], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 1:

\n

[[0]]$=\\;$[[1]]

", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "x/{d}", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "caseSensitive": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{n}-{a}", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "caseSensitive": false, "valuegenerators": []}], "sortAnswers": false}, {"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

What is the second inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayColumns": 0, "showCellAnswerState": true, "choices": ["

$-\\var{a}$

", "

$\\times\\var{d}$

"], "matrix": [1, 1], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 2:

\n

$x=\\;$[[0]]

", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{d}({n}-{a})", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "caseSensitive": false, "valuegenerators": []}], "sortAnswers": false}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}, {"name": "2-step equation 5", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Martin Jones", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/145/"}], "tags": [], "metadata": {"description": "", "licence": "None specified"}, "statement": "

Solve the equation

\n

\\[\\sqrt{\\frac{\\var{f}}{x}}=\\var{n}\\]

", "advice": "", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"g": {"name": "g", "group": "Ungrouped variables", "definition": "random(5..15 except [a,b,c,d])", "description": "", "templateType": "anything", "can_override": false}, "b": {"name": "b", "group": "Ungrouped variables", "definition": "random(1..9 except a)", "description": "", "templateType": "anything", "can_override": false}, "a": {"name": "a", "group": "Ungrouped variables", "definition": "random(1..9)", "description": "", "templateType": "anything", "can_override": false}, "d": {"name": "d", "group": "Ungrouped variables", "definition": "random(2..5)", "description": "", "templateType": "anything", "can_override": false}, "x": {"name": "x", "group": "Ungrouped variables", "definition": "random(1..9 except n)", "description": "", "templateType": "anything", "can_override": false}, "n": {"name": "n", "group": "Ungrouped variables", "definition": "random(1..6)", "description": "", "templateType": "anything", "can_override": false}, "c": {"name": "c", "group": "Ungrouped variables", "definition": "random(2..9 except [a,b])", "description": "", "templateType": "anything", "can_override": false}, "f": {"name": "f", "group": "Ungrouped variables", "definition": "n^2*x", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["a", "c", "n", "g", "x", "b", "f", "d"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

What is the first inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["

square

", "

divide into $\\var{f}$

"], "matrix": [1, 0], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 1:

\n

[[0]]$=\\;$[[1]]

", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{f}/x", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "caseSensitive": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{n}^2", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "caseSensitive": false, "valuegenerators": []}], "sortAnswers": false}, {"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

What is the second inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayColumns": 0, "showCellAnswerState": true, "choices": ["

square

", "

divide into $\\var{f}$

"], "matrix": [1, 1], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 2:

\n

$x=\\;$[[0]]

", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{x}", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "caseSensitive": false, "valuegenerators": []}], "sortAnswers": false}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}, {"name": "2-step equation 6", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Martin Jones", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/145/"}], "variable_groups": [], "preamble": {"js": "", "css": ""}, "parts": [{"showCorrectAnswer": true, "minMarks": 0, "displayType": "radiogroup", "unitTests": [], "marks": 0, "showFeedbackIcon": true, "type": "1_n_2", "variableReplacementStrategy": "originalfirst", "matrix": [1, 0], "shuffleChoices": true, "variableReplacements": [], "useCustomName": false, "adaptiveMarkingPenalty": 0, "customName": "", "extendBaseMarkingAlgorithm": true, "distractors": ["", ""], "maxMarks": 0, "prompt": "

What is the first inverse operation?

", "displayColumns": 0, "scripts": {}, "customMarkingAlgorithm": "", "choices": ["

square root

", "

$-\\var{a}$

"], "showCellAnswerState": true}, {"extendBaseMarkingAlgorithm": true, "showCorrectAnswer": true, "unitTests": [], "showFeedbackIcon": true, "type": "gapfill", "variableReplacementStrategy": "originalfirst", "sortAnswers": false, "scripts": {}, "customMarkingAlgorithm": "", "adaptiveMarkingPenalty": 0, "gaps": [{"showCorrectAnswer": true, "checkVariableNames": false, "useCustomName": false, "unitTests": [], "showFeedbackIcon": true, "type": "jme", "variableReplacementStrategy": "originalfirst", "failureRate": 1, "vsetRange": [0, 1], "variableReplacements": [], "customMarkingAlgorithm": "", "vsetRangePoints": 5, "adaptiveMarkingPenalty": 0, "customName": "", "extendBaseMarkingAlgorithm": true, "checkingAccuracy": 0.001, "answer": "x+{a}", "checkingType": "absdiff", "scripts": {}, "valuegenerators": [{"value": "", "name": "x"}], "marks": 1, "showPreview": true}, {"showCorrectAnswer": true, "checkVariableNames": false, "useCustomName": false, "unitTests": [], "showFeedbackIcon": true, "type": "jme", "variableReplacementStrategy": "originalfirst", "failureRate": 1, "vsetRange": [0, 1], "variableReplacements": [], "customMarkingAlgorithm": "", "vsetRangePoints": 5, "adaptiveMarkingPenalty": 0, "customName": "", "extendBaseMarkingAlgorithm": true, "checkingAccuracy": 0.001, "answer": "{x+a}", "checkingType": "absdiff", "scripts": {}, "valuegenerators": [], "marks": 1, "showPreview": false}, {"showCorrectAnswer": true, "checkVariableNames": false, "useCustomName": false, "unitTests": [], "showFeedbackIcon": true, "type": "jme", "variableReplacementStrategy": "originalfirst", "failureRate": 1, "vsetRange": [0, 1], "variableReplacements": [], "customMarkingAlgorithm": "", "vsetRangePoints": 5, "adaptiveMarkingPenalty": 0, "customName": "", "extendBaseMarkingAlgorithm": true, "checkingAccuracy": 0.001, "answer": "-{x+a}", "checkingType": "absdiff", "scripts": {}, "valuegenerators": [], "marks": 1, "showPreview": false}], "marks": 0, "variableReplacements": [], "useCustomName": false, "prompt": "

Step 1:

\n

[[0]] = [[1]] or [[2]]

", "customName": ""}, {"showCorrectAnswer": true, "minMarks": 0, "displayType": "radiogroup", "unitTests": [], "marks": 0, "showFeedbackIcon": true, "type": "1_n_2", "variableReplacementStrategy": "originalfirst", "matrix": [0, 1], "shuffleChoices": true, "variableReplacements": [], "useCustomName": false, "adaptiveMarkingPenalty": 0, "customName": "", "extendBaseMarkingAlgorithm": true, "distractors": ["", ""], "maxMarks": 0, "prompt": "

What is the second inverse operation?

", "displayColumns": 0, "scripts": {}, "customMarkingAlgorithm": "", "choices": ["

square root

", "

$-\\var{a}$

"], "showCellAnswerState": true}, {"extendBaseMarkingAlgorithm": true, "showCorrectAnswer": true, "unitTests": [], "showFeedbackIcon": true, "type": "gapfill", "variableReplacementStrategy": "originalfirst", "sortAnswers": false, "scripts": {}, "customMarkingAlgorithm": "", "adaptiveMarkingPenalty": 0, "gaps": [{"showCorrectAnswer": true, "checkVariableNames": false, "useCustomName": false, "unitTests": [], "showFeedbackIcon": true, "type": "jme", "variableReplacementStrategy": "originalfirst", "failureRate": 1, "vsetRange": [0, 1], "variableReplacements": [], "customMarkingAlgorithm": "", "vsetRangePoints": 5, "adaptiveMarkingPenalty": 0, "customName": "", "extendBaseMarkingAlgorithm": true, "checkingAccuracy": 0.001, "answer": "x", "checkingType": "absdiff", "scripts": {}, "valuegenerators": [{"value": "", "name": "x"}], "marks": 1, "showPreview": false}, {"showCorrectAnswer": true, "checkVariableNames": false, "useCustomName": false, "unitTests": [], "showFeedbackIcon": true, "type": "jme", "variableReplacementStrategy": "originalfirst", "failureRate": 1, "vsetRange": [0, 1], "variableReplacements": [], "customMarkingAlgorithm": "", "vsetRangePoints": 5, "adaptiveMarkingPenalty": 0, "customName": "", "extendBaseMarkingAlgorithm": true, "checkingAccuracy": 0.001, "answer": "{x}", "checkingType": "absdiff", "scripts": {}, "valuegenerators": [], "marks": 1, "showPreview": false}, {"showCorrectAnswer": true, "checkVariableNames": false, "useCustomName": false, "unitTests": [], "showFeedbackIcon": true, "type": "jme", "variableReplacementStrategy": "originalfirst", "failureRate": 1, "vsetRange": [0, 1], "variableReplacements": [], "customMarkingAlgorithm": "", "vsetRangePoints": 5, "adaptiveMarkingPenalty": 0, "customName": "", "extendBaseMarkingAlgorithm": true, "checkingAccuracy": 0.001, "answer": "-{x+2*a}", "checkingType": "absdiff", "scripts": {}, "valuegenerators": [], "marks": 1, "showPreview": false}], "marks": 0, "variableReplacements": [], "useCustomName": false, "prompt": "

Step 2:

\n

[[0]] = [[1]] or [[2]]

", "customName": ""}], "advice": "", "tags": [], "variables": {"n": {"templateType": "anything", "definition": "(x+a)^2", "description": "", "name": "n", "group": "Ungrouped variables"}, "c": {"templateType": "anything", "definition": "random(2..9 except [a,b])", "description": "", "name": "c", "group": "Ungrouped variables"}, "b": {"templateType": "anything", "definition": "random(1..9 except a)", "description": "", "name": "b", "group": "Ungrouped variables"}, "g": {"templateType": "anything", "definition": "random(5..15 except [a,b,c,d])", "description": "", "name": "g", "group": "Ungrouped variables"}, "d": {"templateType": "anything", "definition": "random(2..5)", "description": "", "name": "d", "group": "Ungrouped variables"}, "f": {"templateType": "anything", "definition": "n^2*x", "description": "", "name": "f", "group": "Ungrouped variables"}, "a": {"templateType": "anything", "definition": "random(1..9)", "description": "", "name": "a", "group": "Ungrouped variables"}, "x": {"templateType": "anything", "definition": "random(1..9)", "description": "", "name": "x", "group": "Ungrouped variables"}}, "rulesets": {}, "variablesTest": {"condition": "", "maxRuns": 100}, "functions": {}, "ungrouped_variables": ["a", "c", "b", "d", "g", "f", "n", "x"], "statement": "

Solve the equation

\n

\\[(x+\\var{a})^2=\\var{n}\\]

", "metadata": {"licence": "None specified", "description": ""}}, {"name": "2-step equation 7", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Martin Jones", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/145/"}], "variable_groups": [], "preamble": {"js": "", "css": ""}, "parts": [{"showCorrectAnswer": true, "minMarks": 0, "displayType": "radiogroup", "unitTests": [], "marks": 0, "showFeedbackIcon": true, "extendBaseMarkingAlgorithm": true, "variableReplacementStrategy": "originalfirst", "matrix": [0, 1], "shuffleChoices": true, "variableReplacements": [], "useCustomName": false, "adaptiveMarkingPenalty": 0, "customName": "", "type": "1_n_2", "distractors": ["", ""], "displayColumns": 0, "prompt": "

What is the first inverse operation?

", "maxMarks": 0, "scripts": {}, "customMarkingAlgorithm": "", "choices": ["

subtract from $\\var{g}$

", "

$\\times\\var{d}$

"], "showCellAnswerState": true}, {"type": "gapfill", "showCorrectAnswer": true, "useCustomName": false, "showFeedbackIcon": true, "extendBaseMarkingAlgorithm": true, "prompt": "

Step 1:

\n

[[0]] = [[1]]

", "variableReplacementStrategy": "originalfirst", "sortAnswers": false, "scripts": {}, "unitTests": [], "marks": 0, "variableReplacements": [], "customMarkingAlgorithm": "", "gaps": [{"showCorrectAnswer": true, "checkVariableNames": false, "unitTests": [], "showFeedbackIcon": true, "extendBaseMarkingAlgorithm": true, "variableReplacementStrategy": "originalfirst", "failureRate": 1, "vsetRange": [0, 1], "variableReplacements": [], "useCustomName": false, "vsetRangePoints": 5, "adaptiveMarkingPenalty": 0, "customName": "", "type": "jme", "checkingAccuracy": 0.001, "answer": "{g}-x", "valuegenerators": [{"value": "", "name": "x"}], "checkingType": "absdiff", "scripts": {}, "customMarkingAlgorithm": "", "showPreview": true, "marks": 1}, {"showCorrectAnswer": true, "checkVariableNames": false, "unitTests": [], "showFeedbackIcon": true, "extendBaseMarkingAlgorithm": true, "variableReplacementStrategy": "originalfirst", "failureRate": 1, "vsetRange": [0, 1], "variableReplacements": [], "useCustomName": false, "vsetRangePoints": 5, "adaptiveMarkingPenalty": 0, "customName": "", "type": "jme", "checkingAccuracy": 0.001, "answer": "{d*n}", "valuegenerators": [], "checkingType": "absdiff", "scripts": {}, "customMarkingAlgorithm": "", "showPreview": false, "marks": 1}], "adaptiveMarkingPenalty": 0, "customName": ""}, {"showCorrectAnswer": true, "minMarks": 0, "unitTests": [], "marks": 0, "showFeedbackIcon": true, "extendBaseMarkingAlgorithm": true, "variableReplacementStrategy": "originalfirst", "matrix": [1, 0], "shuffleChoices": true, "variableReplacements": [], "useCustomName": false, "adaptiveMarkingPenalty": 0, "customName": "", "type": "1_n_2", "distractors": ["", ""], "displayColumns": 0, "prompt": "

What is the second inverse operation?

", "maxMarks": 0, "scripts": {}, "customMarkingAlgorithm": "", "choices": ["

subtract from $\\var{g}$

", "

$\\times\\var{d}$

"], "showCellAnswerState": true}, {"type": "gapfill", "showCorrectAnswer": true, "useCustomName": false, "showFeedbackIcon": true, "extendBaseMarkingAlgorithm": true, "prompt": "

Step 2:

\n

[[0]] = [[1]]

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Solve the equation:

\n

\\[\\frac{\\var{g}-x}{\\var{d}}=\\var{n}\\]

", "advice": "", "variablesTest": {"condition": "", "maxRuns": 100}}, {"name": "2-step equation 8", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Martin Jones", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/145/"}], "tags": [], "metadata": {"description": "", "licence": "None specified"}, "statement": "

Solve the equation

\n

\\[\\frac{\\var{f}}{x-\\var{b}}=\\var{n}\\]

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What is the second inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["

divide into $\\var{f}$

", "

$+\\var{b}$

"], "matrix": [1, 0], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 1:

\n

[[0]] = [[1]]

", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "x-{b}", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{x}-{b}", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": []}], "sortAnswers": false}, {"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

What is the first inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayColumns": 0, "showCellAnswerState": true, "choices": ["

divide into $\\var{f}$

", "

$+\\var{b}$

"], "matrix": [0, 1], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 2:

\n

[[0]] = [[1]]

", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "x", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{x}", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": []}], "sortAnswers": false}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}, {"name": "2-step equation 9", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Martin Jones", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/145/"}], "tags": [], "metadata": {"description": "", "licence": "None specified"}, "statement": "

Solve the equation

\n

\\[\\var{c}\\sqrt{x}=\\var{n}\\]

", "advice": "", "rulesets": {}, "variables": {"c": {"name": "c", "group": "Ungrouped variables", "definition": "random(2..9)", "description": "", "templateType": "anything"}, "x": {"name": "x", "group": "Ungrouped variables", "definition": "random(1,4,9,16,25,36,49,64,81,100,121,144)", "description": "", "templateType": "anything"}, "n": {"name": "n", "group": "Ungrouped variables", "definition": "c*sqrt(x)", "description": "", "templateType": "anything"}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["c", "x", "n"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 1:

\n

[[0]] = [[1]]

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What is the second inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayColumns": 0, "showCellAnswerState": true, "choices": ["

square

", "

$\\div\\var{c}$

"], "matrix": [1, 0], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 2:

\n

[[0]] = [[1]]

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Solve the equation

\n

\\[\\var{g}-\\frac{\\var{f}}{x}=\\var{n}\\]

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What is the first inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["

divide into $\\var{f}$

", "

subtract from $\\var{g}$

"], "matrix": [0, 1], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 1:

\n

[[0]] = [[1]]

", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{f}/x", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{f}/{x}", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": []}], "sortAnswers": false}, {"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

What is the second inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayColumns": 0, "showCellAnswerState": true, "choices": ["

divide into $\\var{f}$

", "

subtract from $\\var{g}$

"], "matrix": [1, 0], "distractors": ["", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 2:

\n

[[0]] = [[1]]

", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "x", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": [{"name": "x", "value": ""}]}, {"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{x}", "showPreview": false, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "valuegenerators": []}], "sortAnswers": false}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}]}, {"name": "3-step equations", "pickingStrategy": "all-ordered", "pickQuestions": 1, "questionNames": ["", "", ""], "variable_overrides": [[], [], []], "questions": [{"name": "3-step equation 1", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Martin Jones", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/145/"}], "functions": {}, "ungrouped_variables": ["a", "c", "b", "d", "g", "f", "n", "x"], "tags": [], "preamble": {"css": "", "js": ""}, "advice": "", "rulesets": {}, "parts": [{"displayColumns": 0, "prompt": "

What is the first inverse operation?

", "matrix": [0, 1, 0], "shuffleChoices": true, "marks": 0, "choices": ["

$+\\var{b}$

", "

$\\div\\var{c}$

", "

square root

"], "displayType": "radiogroup", "showCorrectAnswer": true, "scripts": {}, "maxMarks": 0, "type": "1_n_2", "distractors": ["", "", ""], "minMarks": 0}, {"prompt": "

Step 1:

\n

[[0]] = [[1]]

", "marks": 0, "gaps": [{"vsetrangepoints": 5, "expectedvariablenames": [], "checkingaccuracy": 0.001, "vsetrange": [0, 1], "showpreview": true, "marks": 1, "showCorrectAnswer": true, "scripts": {}, "answer": "x^2-{b}", "checkingtype": "absdiff", "checkvariablenames": false, "type": "jme"}, {"vsetrangepoints": 5, "expectedvariablenames": [], "checkingaccuracy": 0.001, "vsetrange": [0, 1], "showpreview": false, "marks": 1, "showCorrectAnswer": true, "scripts": {}, "answer": "{n}/{c}", "checkingtype": "absdiff", "checkvariablenames": false, "type": "jme"}], "showCorrectAnswer": true, "scripts": {}, "type": "gapfill"}, {"displayColumns": 0, "prompt": "

What is the second inverse operation?

", "matrix": [1, 0, 0], "shuffleChoices": true, "marks": 0, "choices": ["

$+\\var{b}$

", "

$\\div\\var{c}$

", "

square root

"], "displayType": "radiogroup", "showCorrectAnswer": true, "scripts": {}, "maxMarks": 0, "type": "1_n_2", "distractors": ["", "", ""], "minMarks": 0}, {"prompt": "

Step 2:

\n

[[0]] = [[1]]

", "marks": 0, "gaps": [{"vsetrangepoints": 5, "expectedvariablenames": [], "checkingaccuracy": 0.001, "vsetrange": [0, 1], "showpreview": true, "marks": 1, "showCorrectAnswer": true, "scripts": {}, "answer": "x^2", "checkingtype": "absdiff", "checkvariablenames": false, "type": "jme"}, {"vsetrangepoints": 5, "expectedvariablenames": [], "checkingaccuracy": 0.001, "vsetrange": [0, 1], "showpreview": false, "marks": 1, "showCorrectAnswer": true, "scripts": {}, "answer": "{x}^2", "checkingtype": "absdiff", "checkvariablenames": false, "type": "jme"}], "showCorrectAnswer": true, "scripts": {}, "type": "gapfill"}, {"displayColumns": 0, "prompt": "

What is the third inverse operation?

", "matrix": [0, 0, 1], "shuffleChoices": true, "marks": 0, "choices": ["

$+\\var{b}$

", "

$\\div\\var{c}$

", "

square root

"], "displayType": "radiogroup", "showCorrectAnswer": true, "scripts": {}, "maxMarks": 0, "type": "1_n_2", "distractors": ["", "", ""], "minMarks": 0}, {"prompt": "

Step 2:

\n

[[0]] = [[1]] or [[2]]

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Solve the equation

\n

\\[\\var{c}(x^2-\\var{b})=\\var{n}\\]

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Solve the equation

\n

\\[\\frac{\\sqrt{x+\\var{a}}}{\\var{d}}=\\var{n}\\]

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What is the first inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["

$-\\var{a}$

", "

$\\times\\var{d}$

", "

square

"], "matrix": [0, 1, 0], "distractors": ["", "", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 1:

\n

[[0]] = [[1]]

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What is the second inverse operation?

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$-\\var{a}$

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$\\times\\var{d}$

", "

square

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Step 2:

\n

[[0]] = [[1]]

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What is the third inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayColumns": 0, "showCellAnswerState": true, "choices": ["

$-\\var{a}$

", "

$\\times\\var{d}$

", "

square

"], "matrix": [1, 0, 0], "distractors": ["", "", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 2:

\n

[[0]] = [[1]]

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Solve the equation

\n

\\[(\\var{g}-\\var{c}x)^2=\\var{n}\\]

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What is the first inverse operation?

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subtract from $\\var{g}$

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$\\div\\var{c}$

", "

square root

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Step 1:

\n

[[0]] = [[1]] or [[2]]

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What is the second inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["

subtract from $\\var{g}$

", "

$\\div\\var{c}$

", "

square root

"], "matrix": [1, 0, 0], "distractors": ["", "", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 2:

\n

[[0]]$=\\;$[[1]] or [[2]]

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What is the third inverse operation?

", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["

subtract from $\\var{g}$

", "

$\\div\\var{c}$

", "

square root

"], "matrix": [0, 1, 0], "distractors": ["", "", ""]}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "

Step 2:

\n

$x=\\;$[[0]] or [[1]]

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Solve the equation

\n

\\[\\simplify[!collectnumbers]{{a}+{b}/({c}-x)^2}=\\var{n}\\]

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What is the first inverse operation?

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$-\\var{a}$

", "

Divide into $\\var{b}$

", "

Square root

", "

Subtract from $\\var{c}$

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Step 1:

\n

[[0]] = [[1]]

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What is the second inverse operation?

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$-\\var{a}$

", "

Divide into $\\var{b}$

", "

Square root

", "

Subtract from $\\var{c}$

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Step 2:

\n

[[0]] = [[1]]

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What is the third inverse operation?

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$-\\var{a}$

", "

Divide into $\\var{b}$

", "

Square root

", "

Subtract from $\\var{c}$

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Step 3:

\n

[[0]] = [[1]] or [[2]]

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What is the fourth inverse operation?

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$-\\var{a}$

", "

Divide into $\\var{b}$

", "

Square root

", "

Subtract from $\\var{c}$

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Step 4:

\n

$x=\\;$[[0]] or [[1]]

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