Answer:
32 dimes and 25 quarters
Explanation:
let Q = quarters and D = dimes
2Q - 18 = D
25Q + 10D = 945
we can replace D
25Q + 10(2Q - 18) = 945
25Q + 20Q -180 = 945
45Q = 1,125
Q = 1,125 / 45 = 25
D = (2 x 25) - 18 = 50 - 18 = 32
to check the answer:
(25 x 25) + (32 x 10) = 625 + 320 = 945
