Question 1126003
d+q = 15; d = 15-q
10d+25q = 270 substitute for d:
10(15-q)+25q = 270
150-10q+25q = 270
15q = 120
q = 8 Antonio has 8 quarters
8 x 25 = 200
270 - 200 = 70
70/10 = 7 Antonio has 7 dimes