SOLUTION: Ann has 1.70 in dimes and nickles. She has two more dimes than nickles. How many nickles does she have.

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Question 187313: Ann has 1.70 in dimes and nickles. She has two more dimes than nickles. How many nickles does she have.
Answer by stanbon(48534) About Me  (Show Source):
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Ann has 1.70 in dimes and nickles. She has two more dimes than nickles. How many nickles does she have.
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Value Equation: 10d + 5n = 170 cents
Quantity Eq...: d = n + 2
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Substitute to solve for "n":
10(n+2) + 5n = 170
10n + 20 + 5n = 170
15n = 150
n = 10 (# of nickels)
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Substitute into d = n+2 to solve for "d":
d = 10+2 = 12 (# of dimes)
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Cheers,
Stan H.