Question 255886
.20x+.10(10-x)=.16*10
.20x+1-.10x=1.6
.10x=1.6-1
.10x=.6
x=.6//.10
x=6 liters of 20% is needed.
Proof:
.20*6+.10(10-6)=1.6
1.2+.10*4=1.6
1.2+.4=1.6
1.6=1.6