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20 May, 22:24

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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Answers (1)
  1. 21 May, 01:07
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    75=3 (x) - 3

    Step-by-step explanation:

    Translating the words into math, we get the following:

    "A pack of gum costs 75 cents." tells us that a pack of gum is 75 cents.

    "That is 3 cents less than three times what the pack cost 20 years ago" tells us that 3 (x) - 3 cents is how much it costed 20 years ago.

    Setting these equal we get 75=3 (x) - 3 which tells us that x=26 which means the pack of gum costed 26 cents 20 years ago.
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