SOLUTION: A pot contains 8 L of brine at a concentration of 120 g/L. How much of the water should be boiled off to increase the concentration to 150 g/ \

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Question 703000: A pot contains 8 L of brine at a concentration of 120 g/L. How much of the water should be boiled off to increase the concentration to 150 g/
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Answer by josgarithmetic(39614) About Me  (Show Source):
You can put this solution on YOUR website!
Present concentration:
%288%2A%28120%29%29%2F8=120, as grams per liter.

Concentration wanted after boiling off some water:
8%2A120%2F%288-v%29=150, as grams per liter, variable v is for how much water to boil off.

%288-v%29%2F%288%2A120%29=1%2F150
8-v=%288%2A120%29%2F150
-v=-8%2B%288%2A120%29%2F150
v=8-%288%2A120%29%2F150
v=1.6 liters.