Question 171066
O+A=14 O=14-A
.55O+.45A=7.40
.55(14-A)+.45A=7.40
7.70-.55A+.45A=7.40
-.1A=7.40-7.70
-.1A=-.30
A=-.30/-.1
A=3 IS THE NUMBER OF APPLE JUICES BOUGHT.
O=14-A
O=14-3
O=11 IS THE NUMBER OF ORANGE JUICES BOUGHT.
PROOF:
.55*11+.45*3=7.40
6.05+1.35=7.40
7.40=7.40