Question 833420
"Laura has $4.50 in dimes and quarters. She has 3 more dimes than quarters. How many quarters does she have?" 
Equations:
Quantity: d = q + 3
Value::: 10d + 25q = 450 cents
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Substitute for "d" and solve for "q":
10(q+3) + 25q = 450
10q + 30 + 25q = 450
35q = 420
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q = 12 (# of quarters)
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d = q+3 = 15 (# of dimes)
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Cheers,
Stan H.
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