+67 David paid $2.85 for a snack with only quarters and dimes. He used 3 more quarters than dimes.
How many quarters and dimes did he use to pay for the snack?
+37084 d= dimes
q= d + 3
10(d) + 25 (d+3) = 285
35d + 75 = 285
35d = 210
d=dimes = 6 q = 3+6 = 9
