Question 299319: Phil has 100 nickels and dimes worth $6.10. how many nickels does he have?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Phil has 100 nickels and dimes worth $6.10. how many nickels does he have?
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Equations:
Quantity Equation: n + d = 100
Value equation::: 5n+10d = 610 cents
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To solve for "n", eliminate the "d" terms.
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Multiply thru the Quantity equation by 10.
10n + 10d = 1000
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Subtract the Value equation from that and solve for "n":
5n = 390
n = 78 (# of nickels)
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Cheers,
Stan H.
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