Question 358540
.70*100+.40X=.50(100+X)
70+.40X=50+.50X
.40X-.50X=50-70
-.10X=-20
X=-20/-.10
X=200 ml. OF THE 40% ALCOHOL IS USED.
PROOF:
.70*100+.40*200=.50(100+200)
70+80=.5*300
150=150