Jared has some quarters and dimes that total $5.50. If he has 8 more quarters that dimes, how much dimes does Jared have?

Answer: 10 dimes

Solve using system of equations.

q=number of quarters and d=number of dimes

.25q+.10d=5.50 because the total of dimes and quarters is $5.50

8+d=q because there are 8 more quarters than dimes

substitute 8+d for q into the first equation to get. 25 (8+d) +.10d=5.50

then simplify

2+.35d=5.50

.35d=3.50

d=10 he has 10 dimes