Question
3. A vending machine that only accepts dimes and quarters contains 36 coins totaling $7.20. How many of each coin does the machine contain?
Answers
number of dimes --- x
number of quarters ---- 36-x
10x + 25(36-x) = 720
solve for x
number of quarters ---- 36-x
10x + 25(36-x) = 720
solve for x
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