SOLUTION: Forty-three nickels and dimes have a total value of $3.45. How many nickels are there?

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Question 179782: Forty-three nickels and dimes have a total value of $3.45. How many nickels are there?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
N+D=43 OR N=43-D
.05N+.10D=3.45
.05(43-D)+D=3.45
2.15-.05D+D=3.45
.05D=3.45-2.15
.05D=1.30
D=1.30/.05
D=26 IS THE NUMBER OD DIMES.
N+26=43
N=43-26
N=17 NUMBER OF NICKELS.
PROOF:
.05*17+.10*26=3.45
.85+2.60=3.45
3.45=3.45