SOLUTION: Suppose you have 33 coins. Some are quarters and some are dimes. The coins are worth a total of $6.90. How many of each coin do you have?

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Question 1068593: Suppose you have 33 coins. Some are quarters and some are dimes. The coins are worth a total of $6.90. How many of each coin do you have?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
d dimes
q quarters
system%28d%2Bq=33%2C10d%2B25q=690%29


Simplify the money (cents) count equation.
2d%2B5q=138

Elimination Method will be convenient as a next step.
system%28d%2Bq=33%2C2d%2B5q=138%29

system%282d%2B2q=66%2C2d%2B5q=138%29

3q=72

highlight%28q=24%29
-
d=33-24
highlight%28d=9%29