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Find ${17-a}$  if $a=\\var n $

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Find ${a-2b} $ if $a=\\var m $, $b=\\var n$

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Find ${b^2-a} $ if $a=\\var m $, $b=\\var n$

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Simplify $\\var{m}x +(\\var{n}x)$

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Solve $\\var{m}+x=\\var{n}$

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Solve $\\var{m}x=\\var{l}$

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Solve $\\var{m}x=\\var{k}$

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Solve $x/\\var{m}= 6$

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Solve $\\simplify{{m}x+2=12}$

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Substitution and solving equations

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l is 4 times of m

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k is a third of m

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n is a negative integer

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