SOLUTION: andrew had $3.70 in dimes and quarters in his coin collection. he'd had 9 more dimes than quarters. how many quarters did andrew have?

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Question 1135665: andrew had $3.70 in dimes and quarters in his coin collection. he'd had 9 more dimes than quarters. how many quarters did andrew have?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
q quarters
q+9 dimes

0.25q%2B0.1%28q%2B9%29=3.7-----------this accounts for the money in dollars.