Question 207940
.40x+.20(25-x)=.32*25
.40x+5-.20x=8
.20x=8-5
.20x=3
x=3/-20
x=15 gal. of 40% is used.
25-15=10 gal. of 20% is used.
Proof:
.40*15+.20*10=8
6+2=8
8=8
10 gallons 20% solution, 15 gallons 40% solution