SOLUTION: A pile of 40 coins consists of nickels and dimes. The total value of the coins is $3.35. Find the number of each type of coin.

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Question 362602: A pile of 40 coins consists of nickels and dimes. The total value of the coins is $3.35. Find the number of each type of coin.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
N+D=40 OR N=40-D
.05N+.10D=3.35
.05(40-D)+.10D=3.35
2-.05D+.10D=3.35
.05D=3.35-2
.05D=1.35
D=1.35/.05
D=27 DIMES.
N=40-27=13 NICKELS.
PROOF:
.05*13+.10*27=3.35
.65+2.70=3.35
3.35=3.35