Chase has 3 times as many dimes as quarters. The quarters have a total value of 6.60 dollars. How many of each coin does he have?
Let the number of quarters = Q
Then, the number of dimes =3Q
0.25Q + 0.10 * 3Q = 6.60, solve for Q
Q = 12 quarters
6.60 - [12 x 0.25] = 3.60 dollars, which are ALL in dimes.
[3.60 x 100] / 10 = 36 dimes.