Question 232904
.30*2+.15x=.18(2+x)
.60+.15x=.36+.18x
.15x-.18x=.36-.60
-.03x=.24
x=-.24/-.03
x=8 liters of 15% salt solution is used.
Proof:
.30*2+.15*8=.18(2+8)
.60+1.2=.18*10
1.8=1.8