# heike hoffmann

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## heike's activity

#### heike hoffmann on Simultaneous equations: elimination 2 years, 6 months ago

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#### heike hoffmann on Solving linear equations: collecting like terms and solving 2 years, 6 months ago

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#### heike hoffmann on Algebra VIII: solving simultaneous equations (equate & substitute) 2 years, 6 months ago

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#### heike hoffmann on Algebra VIII: solving simultaneous equations (by elimination) 2 years, 6 months ago

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