Question 990102
n = number of nickels
d = number of dimes
q = number of quarters


d = 3q
n = 2d - 5 = 6q - 5
5n + 10d + 25q = 655


Write everything in terms of q.


5(6q - 5) + 10(3q) + 25q = 655
30q - 25 + 30q + 25q = 655
85q = 680
q = 8 ---> d = 24


---> 43 nickels, 24 dimes, 8 quarters