SOLUTION: Warren has 40 coins (all nickels, dimes, and quarters) worth $4.05. He has 7 more nickels than dimes. How many quarter does Warren have? Thank you.

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Question 108059: Warren has 40 coins (all nickels, dimes, and quarters) worth $4.05. He has 7
more nickels than dimes. How many quarter does Warren have?
Thank you.

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let x=dimes, so x+7=nickels and 40-(2x+7)=quarters ... 10x+5(x+7)+25(40-(2x+7))=405

10x+5x+35+1000-50x-175=405 ... -35x=-455