Question 479688
1000 mls x 30%=300 mls
1000 mls - 300 mls = 700 mls water
.5(x)+1(1000-x)=700
.5x+1000-x=700
.5x=300
x=300/.5=600
You need 600 ml of .5 solution and 400 ml of pure water..