SOLUTION: Bob has 5 coins in mickels and dimes. Altogether he has $.40. How many dimes and nickels does he have?

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Question 397607: Bob has 5 coins in mickels and dimes. Altogether he has $.40. How many dimes and nickels does he have?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let N be the number of nickels, D the number of dimes.
1.N%2BD=5
.
.
5N%2B10D=40
2.N%2B2D=8
Subtract eq. 1 from eq. 2,
N%2B2D-N-D=8-5
D=3
Then from eq. 1,
N%2B3=5
N=2