Question 135455
.6x+.3(300-x)=.5*300
.6x+90-.3x=150
.3x=150-90
.3x=60
x=60/.3
x=200 ml of 60% is used.
300-200=100 ml of 30% is used.
proof:
.6*200+.3*100=150
120+30=150
150=150