Question 718117
X+Y=54
X=54-Y
.20X+.50Y=20.70
.20(54-Y)+.50Y=20.70
10.80-.20Y+.50Y=20.70
.30Y=20.70-10.80
.30Y=9.90
Y=9.90/.30
Y=33 50-CENT COINS.
X+33=54
X=54-33
X=21 20-CENT COINS.
PROOF:
.20*21+.50*33=20.70
4.20+16.50=20-70
20.70=20.70