Question 712102
.80*10+.40X=.65(X+10)
8+.40X=.65X+6.5
.40X-.65X=6.5-8
-.25X=-1.5
X=-1.5/-.25
X=6 LITERS OF 80$ SOLUTION IS USED.
PROOF:
.80*10+.40*6=.65(6+10)
8+2.4=.65*16
10.4=10.4