Question 928679: Mike has 4.50, all quarters and dimes there are 3 more dimes than quarters find the number of each type of coin Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Mike has 4.50, all quarters and dimes there are 3 more dimes than quarters find the number of each type of coin
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Quantity Eq:: d = q + 3
Value Eq:::: 10d + 25q = 450 cents
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Substitute for "d" and solve for "q"::
10(q+3) 25q = 450
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10q + 30 + 25q = 450
35q = 420
q = 12 (# of quarters)
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d = 12+3 = 15 (# of dimes)
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Cheers,
Stan H.
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