SOLUTION: Thirty pounds of a salt-water solution contains fifteen percent salt. How much water must be added to weaken the solution to ten percent salt?

Question 279720: Thirty pounds of a salt-water solution contains fifteen percent salt. How much water must be added to weaken the solution to ten percent salt?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
In words:
(pounds of salt in final solution)/(pounds of salt + water in final solution) = 10%
Let = pounds of water to be added
given:
The pounds of salt in final solution = pounds
----------------

pounds
If 1 pint = 1 pound, then 15 pints of water should be added
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