SOLUTION: A change purse containing $4.25 in quarters and dimes has, in all 20 coins find the number of each kinds of coins

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Question 1098765: A change purse containing $4.25 in quarters and dimes has, in all 20 coins find the number of each kinds of coins
Answer by josgarithmetic(39620) About Me  (Show Source):
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d dimes
and
20-d quarters

10%2Ad%2B25%2820-d%29=425
-
2d%2B5%2820-d%29=85
2d%2B100-5d=85
-3d=85-100
3d=15
highlight%28d=5%29--------Five dimes
-
Should be highlight%2815%29----------fifteen quarters