Question 228584
.70X+.20(5-X)=.40*5
.70X+1-.20X=2
.50X=2-1
.50X=1
X=1/.5
X=2 L OF 70% SOLUTION IS USED.   |
5-2=3 L OF 20% SOLUTION IS USED. | these are the 2 answers.  
PROOF:
.70*2+.20*3=.40*5
1.4+.6=2
2=2