Eric has a jar of quarters and dimes. He had 48 coins in the jar. The total value of the coins is $7.35. How many quarters are.in the jar?
Please help, I'm bad at word problems.
+1084 Let the number of quarters equal q, and the number of dimes equal d.
We can say that:
q + d = 48
0.25q + 0.1d = 7.35
By using the method of substitution (nothing to do with sub sandwiches, though I would really like one right now), we can say that:
d = 48 - q
Plug that into the second equation:
0.25q + 0.1(48 - q) = 7.35
0.25q + 4.8 - 0.1q = 7.35
0.15q + 4.8 = 7.35
0.15q = 2.55
q = 17
Therefore, there were 17 quarters.
:)
