Question 847326: Bob has 60 coins consisting of quarters and dimes. The coins combined value is $9.45. Find out how many are quarters and how many are dimes Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Bob has 60 coins consisting of quarters and dimes. The coins combined value is $9.45. Find out how many are quarters and how many are dimes
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Quantity Eq:: d + q = 60 coins
Value Eq:: 10d+25q = 945 cents
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Modify:
2d + 2q = 120
2d + 5q = 189
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Subtract:
3q = 69
q = 23 (# of quarters)
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Solve for "d":
d+q = 60
d + 23 = 60
d = 37 (# of dimes)
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Cheers,
stan H.
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