Question 817704: [ a jar contains 55 quarters and dimes. The total value of coins is $8.50. Find the number of quarters and dimes in the jar. ]
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! 25q + 10d = 850
q + d = 55
q = 55 - d
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25q + 10d = 850
25(55 - d) + 10d = 850
1375 - 25d + 10d = 850
15d = 525
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d = 35
q = 20
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