Question 123412
.8X+.5(30-X)=.75*30
.8X+15-.5X=22.5
.3X=22.5-15
.3X=7.5
X=7.5/.3
X=25 POUNDS OF $.80 MIX IS USED.
30-25=5 POUNDS OF $.50 MIX IS USED.
PROOF.
.8*25+.5*5=22.5
20+2.5=22.5
22.5=22.5