Question 693487
.70X+.15(4-X)=.30*4
.70X+.60-.15X=1.20
.55X=1.20-.60
.55X=.60
X=.60/.55
X=1.09 ML OF THE 70% SOLUTION IS USED.
4-1.09=2.91 ML OF THE 15% SOLUTION IS USED.
PROOF:
.70*1.09+.15*2.91=1.20
.763+.436=1.20
1.1995=1.20