SOLUTION: A pot contains 6L of brine at a concentration of 120 g/L. How much of the water should be boiled off to increase the concentration to 200 g/L? How do I do this problem?

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Question 1134661: A pot contains 6L of brine at a concentration of 120 g/L. How much of the water should be boiled off to increase the concentration to 200 g/L?
How do I do this problem?


Answer by josgarithmetic(39615) About Me  (Show Source):
You can put this solution on YOUR website!
Removing WATER does not change the AMOUNT OF SALT.

6%2A120%2F%286-w%29=200--------Solve for w.
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200%286-w%29=6%2A120
20%2A10%286-w%29=6%2A20%2A6
10%286-w%29=6%2A6
5%286-w%29=18
30-5w=18
5w=30-18
5w=12
w=12%2F5
highlight%28w=2%262%2F5%29