Question 280927
.20x=.15(12+x)
.20x=1.8+.15x
,20x-.15x=1.8
.05x=1.8
x=1/8/.05
x=36 gallons of saline solution is needed.
Proof:
.20*36=.15(12+36)
7.2=.15*48
7.2=7.2