SOLUTION: Chi has $11.70 in dimes and quarters. The number of dimes is 7 more than three times the number of quarters. How many dimes and quarters does Chi have?

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Question 1080300: Chi has $11.70 in dimes and quarters. The number of dimes is 7 more than three times the number of quarters. How many dimes and quarters does Chi have?
Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
$11.70, same as 1170 cents.

q, number of quarters
d, number of dimes


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$11.70 in dimes and quarters.
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25q%2B10d=1170
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5q%2B2d=234


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The number of dimes is 7 more than three times the number of quarters.
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d=3q%2B7


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5q%2B2%283q%2B7%29=234, one equation in one variable



system%28q=20%2Cd=67%29