Question 892117
you have 3.4 liters of solution.
65% of that solution is antifreeze so you have .65 * 3.4 = 2.21 liters of antifreeze.
35% of that solution is water, soyou have .35 * 3.4 = 1.19 liters of water.


2.21 + 1.29 = 3.4
the numbers check out ok.


now you want to have 50% of each.


that turns out to be 1.7 liters of antifreeze and 1.7 liters of water.


2.21 - 1.7 = .51
1.7 - 1.19 = .51


it looks like you have to drain .51 liters of antifreeze and replace it with .51 liters of water.


when you do that, you will get:


2.21 - .51 = 1.7
1.19 + .51 = 1.7


now you have a 50% solution.