SOLUTION: $14.70 in piggy bank with only dimes and quarters. How many quarters? .10(72-q)+25q=14.70

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Question 995086: $14.70 in piggy bank with only dimes and quarters.
How many quarters?
.10(72-q)+25q=14.70
Answer by josgarithmetic(39799) About Me  (Show Source):
You can put this solution on YOUR website!
Your description does not have enough information.
You only have enough for 0.10d%2B0.25q=14.7 and this can be simplified or adjusted into 2d%2B5q=294.

Your shown equation (wrong because of a decimal mistake) implies a count of coins to be 72, so that d%2Bq=72. If this is the missing part of your description, then now you know you have a system of equations equivalent to
highlight_green%28system%282d%2B5q=294%2Cd%2Bq=72%29%29 which should not be difficult to solve.


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q=50
d=22