SOLUTION: Adam's piggy bank contains dimes and nickels, for a total of 236 coins. The contents are worth a total of 17.40. How many nickels does adam's piggy bank contain?

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Question 1078372: Adam's piggy bank contains dimes and nickels, for a total of 236 coins. The contents are worth a total of 17.40. How many nickels does adam's piggy bank contain?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.N%2BD=236
and
5N%2B10D=1740
2.N%2B2D=348
Subtract 1 from 2,
N%2B2D-N-D=348-236
D=112
Now that you know D use either equation to solve for N.