SOLUTION: How much water must be evaporated from a 6 qt of a 50% anti freeze solution to produce a 75% solution?

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Question 715393: How much water must be evaporated from a 6 qt of a 50% anti freeze solution to produce a 75% solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
6%2A50%2F%286-v%29=75

The amount of pure antifreeze matter stays the same but the amount of water becomes less, meaning volume of antifreeze solution becomes less. v = amount of water to "remove" to get 75 % antifreeze.

%286-v%29%2F%286%2A50%29=1%2F75
6-v=6%2A50%2F75
-v=-6%2B6%2A50%2F75
v=6-6%2A50%2F75
v=6%281-2%2F3%29
v=6%281%2F3%29
Final Numberic Result v=2