SOLUTION: A piggy bank has 70 coins which has only nickels and dimes. The total value in the bank is $5.55. How many nickels and how many dimes?

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Question 342356: A piggy bank has 70 coins which has only nickels and dimes. The total value in the bank is $5.55. How many nickels and how many dimes?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Total number of coins,
1.N%2BD=70
Total value of the coins,
5N%2B10D=555
2.N%2B2D=111
Subtract eq. 1 from eq. 2,
N%2B2D-N-D=111-70
highlight%28D=41%29
Then from eq. 1,
N%2B41=70
highlight%28N=29%29
There are 29 nickels and 41 dimes.