Question 829454: a purse contains $ 6.50 in quarters and dimes.there are 5 more quarters than dimes.find the number of quarters and dimes Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! a purse contains $ 6.50 in quarters and dimes.there are 5 more quarters than dimes.find the number of quarters and dimes
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Quantity: q = d + 5
Value: 10d + 25q = 650 cents
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Modify:
2d - 2q = -10
2d + 5q = 130
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Subtract and solve for "q":
7q = 140
q = 20 (# of quarters)
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Solve for "d":
d = q - 5
d = 20-5
d = 15 (# of dimes)
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Cheers,
Stan H.
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