Question 137432
.12x+.06(15-x)=15*.08
.12x+.9-.06x=1.2
.06x=1.2-.9
.06x=.3
x=.3/.06
x=5 lb of grain should be used.
15-5=10 lb of hay should be used.
proof
.12*5+.06*10=1.2
.6+.6=1.2
1.2=1.2