SOLUTION: sarah has 450 coins with a total value of $75.00. The coins are dimes and quarters. How many of each coin does she have?

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Question 416307: sarah has 450 coins with a total value of $75.00. The coins are dimes and quarters. How many of each coin does she have?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let d = number of dimes
Let q = number of quarters
(1) d+%2B+q+=+450
(2) 10d+%2B+25q+=+7500 (in cents)
multiply both sides of (1) by 10
and subtract from (2), find q, then
find d