SOLUTION: Debí has $1.85 in a collection of dimes and nickels. The number of nickels is seven more than the number of dimes. Find the number of each type of coin. There are __ dimes

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Question 1071548: Debí has $1.85 in a collection of dimes and nickels. The number of nickels is seven more than the number of dimes. Find the number of each type of coin.
There are __ dimes
Answer by josgarithmetic(39631) About Me  (Show Source):
You can put this solution on YOUR website!
Account for the money:
0.05n%2B0.1d=1.85
n%2B2d=37

Coin count description:
n=d%2B7

Substitute for n in the money account, simplified, equation.
d%2B7%2B2d=37
3d=30
highlight%28d=10%29

highlight%28n=17%29