Question 720329
.40*80+.30X=.40(70+X)
32+.30X=28+.40X
.30X-.40X=28-32
-.10X=-4
X=-4/-.10
X=40 OUNCES OF 30% SOLUTION IS USED.
PROOF:
.40*80+.30*40=.40(70+40)
32+12=.40*110
44=44