Question 428319
You have 10 conis that total 85 cents.Some are Dimes and Some are Nickels. How many of each coin do you have?
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Equations:
n + d = 10 coins
5n+10d = 85 cents
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Multiply thru the 1st equation by 5:
5n + 5d = 50
5n + 10d = 85
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Subtract and solve for "d":
5d = 35
d = 7 (# of dimes)
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Solve for "n":
n+d = 10
n + 7 = 10
n = 3 (# of nickels)
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Cheers,
Stan H.
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