SOLUTION: Sally has 100 dimes and quarters worth $21.40. How many of each coin does she have?

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Question 933494: Sally has 100 dimes and quarters worth $21.40. How many of each coin does she have?
Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
Translate the description into equations.

d for dimes, q for quarters.
system%28d%2Bq=100%2C0.1d%2B0.25q=21.4%29
highlight_green%28system%28d%2Bq=100%2C2d%2B5q=428%29%29
Solve the system.