SOLUTION: Mark has 24 coins consisting of dimes and quarters. If the value of the coins is $4.50, how many dimes does mark have?

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Question 1065316: Mark has 24 coins consisting of dimes and quarters. If the value of the coins is $4.50, how many dimes does mark have?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
system%28d%2Bq=24%2C10d%2B25q=450%29

Simplify the money value equation first.

system%282d%2B5q=90%2Cd%2Bq=24%29

Use the coin count to substitute for q.
2d%2B5%2824-d%29=90