SOLUTION: If I have 22 dimes and quarters worth $4.30. How many dimes do I have?

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Question 969815: If I have 22 dimes and quarters worth $4.30. How many dimes do I have?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If I have 22 dimes and quarters worth $4.30. How many dimes do I have?
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D + Q = 22 (# of coins)
10D + 25Q = 430 (value)
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Or,
22 dimes = $2.20
Each dime replaced by a quarter adds 15 cents.
430 - 220 = 210 added by replacement
210/15 = 14 quarters
--> 8 dimes