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Lubov Fominskaja [6]
3 years ago
7

A pack of gum costs 75 cents. That is 3 cents less than three times what the pack cost 20 years ago. Write an equation that coul

d be used to find the cost of the gum 20 years ago.
Mathematics
1 answer:
Eva8 [605]3 years ago
3 0

Answer:

22 cents

Step-by-step explanation:

Dividing 75 by 3 gets you 25. "Less than" as in subtracting, so subtract 3 from 25 and you get 22.

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▹ Answer

<em>(-1, 3)</em>

▹ Step-by-Step Explanation

y - 4x = 7

2y + 4x = 2

<u>Substitute</u>

y - (2 - 2y) = 7

<u>Solve</u>

y = 3

<u>Substitute</u>

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<u>Solve</u>

x = -1

<u>Final Answer</u>

(x, y) = (-1, 3)

Hope this helps!

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bezimeni [28]

Answer:

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Step-by-step explanation:

You have the proportion ...

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