Question 692446
.80X+.20(15-X)=15*.60
.80X+3-.20X=9
.60X=9-3
.60X=6
X=6/.60
X=10 LITERS OF 80% SOLUTION IS USED.
15-10=5 LITERS OF 20% SOLUTION IS USED.
PROOF:
.80*10+.20*5=9
8+1=9
9=9