SOLUTION: You have three more dimes than nickels and two fewer quarter than nickels. The total value of the coins is $5.80. How many nickels do you have?

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Question 171098: You have three more dimes than nickels and two fewer quarter than nickels. The total value of the coins is $5.80. How many nickels do you have?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
d=n+3 and q=n-2

5n+10d+25q=580

substituting __ 5n+10(n+3)+25(n-2)=580 __ 5n+10n+30+25n-50=580 __ 40n-20=580

adding 20 __ 40n=600

dividing by 40 __ n=15