Question

Stella has $4.50 worth of dimes and quarters. She has 3 more dimes than quarters. Determine the number of dimes and the number of quarters that Stella has.

Answer 1

12 quarters, 15 dimes

Explanation:

Let q be the number of quarters and d be the number of dimes. We set up and solve this system of equations:

.10d + .25q = 4.50

d = 3 + q

.10(3 + q) + .25q = 4.50

.30 + .10q + .25q = 4.50

.30 + .35q = 4.50

.35q = 4.20

q = 12, d = 15