SOLUTION: A box contains 140 dimes and nickels.The total value is 11.15$. how many dimes and nickels are there?

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Question 103688: A box contains 140 dimes and nickels.The total value is 11.15$. how many dimes and nickels are there?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let x=dimes so 140-x=nickels ... multiply the number of coins by their value to find the total value

10(x)+5(140-x)=1115 ... 10x+700-5x=1115 ... 5x=415 ... x=83

140-x=140-83=57