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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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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?

User Pranav Darji
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8.1k points

2 Answers

3 votes
(.75 + .03)/3=X

.75 is the cost now. You need to add 3 cents to get it to 3x the cost 20 years ago then divide that total by 3 to get the cost 20 years ago.
User Cocorossello
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8.8k points
5 votes
The most easy way is to keep on minusing the no by 3. if u want to know a simple method
User RajaReddy PolamReddy
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8.8k points
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