SOLUTION: Johnny has 7 more nickels than quarters. If the value of the nickels and quarters totals $5.75, how many of each coin does he have?
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Question 1103927: Johnny has 7 more nickels than quarters. If the value of the nickels and quarters totals $5.75, how many of each coin does he have?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Johnny has 7 more nickels than quarters. If the value of the nickels and quarters totals $5.75, how many of each coin does he have?
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Equations:
Quantity:: n = q + 7 coins
Value:: 5n + 25q = 575 cents
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Modify for eliminatioin::
5n - 5q = 5*7
5n +25q = 575
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Subtract and solve for "q"
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30q = 540
q = 18 (# of quarters)
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n = q+7 = 25 (# of nickels)
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Cheers,
Stan H.
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