Question 1012328: Carlos has 37 coins consisting of quarters and nickels. The total of the coins is $7.85. What are the coins? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Carlos has 37 coins consisting of quarters and nickels. The total of the coins is $7.85. What are the coins?
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Quantity Eq:: n + q = 37 coins
Value EQ:: 5n +25q = 785 cents
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Modify for elimination::
n + q = 37
n + 5q = 157
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Subtract and solve for "q"::
4q = 120
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q = 30 (# of quarters)
n = 37-30 = 7 (# of nickels)
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Cheers,
Stan H.
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