Question 192069
let x and y be the amount of 20% and 60% solutions
:
x+y=100......eq 1
.2x+.6y=.5(100)...eq 2
:
rewrite eq 1 to x=100-y and plug it into eq 2
:
.2(100-y)+.6y=50
:
20-.2y+.6y=50
:
.4y=30
:
y=75 mililiters of 60% solution
:
x=100-y=100-75=25 milliliters of 20% solution