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OpenStudy (anonymous):
19) A pack of gum costs 75 cents. That is 3 cents less than three times what the pack cost 20 years ago. Which equation could be used to find the cost of the gum 20 years ago?
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OpenStudy (mathmale):
Let x be the cost of the gum 20 years ago. What is three times that amount? What is three times that amount, less 3 cents?
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