SOLUTION: A coin box contains twice as many dimes as quarters. If the total value of the coins is $18 how many dimes are there? Please use substitution or elevation to solve.

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Question 1179307: A coin box contains twice as many dimes as quarters. If the total value of the coins is $18 how many dimes are there?
Please use substitution or elevation to solve.
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
system%28d%2Fq=2%2C10d%2B25q=1800%29

system%28q=d%2F2%2C2d%2B5q=360%29

substituting,
2d%2B5%28d%2F2%29=360
continue, simplify, and solve.