Question 1072059: Sally has $8.20 in quarters and nickels. She has 44 total coins. How many nickels and quarters does she have? Answer by ikleyn(52851) (Show Source):
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Sally has $8.20 in quarters and nickels. She has 44 total coins. How many nickels and quarters does she have?
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Let Q be the number of quarters. Then your equation is
25Q + 5*(44-Q) = 820 cents.
Do you understand WHY ?
If you do, then simplify and solve this equation for Q.