Question 362137
.35x+.20*20=.30(20+x)
.35x+4=6+.30x
.35x-.30x=6-4
.05x=2
x=2/.05
x=40 ounces of 35% solution is used.
Proof:
.35*40+.20*20=.30(20+40)
14+4=.30*60
18=18