SOLUTION: 7 qt of a saline solution was mixed with 4 qt of pure water to make 35% saline solution. Find the percent concentration of the first solution.

Question 1026967: 7 qt of a saline solution was mixed with 4 qt of pure water to make 35% saline solution. Find the percent concentration of the first solution.
Found 2 solutions by josgarithmetic, josmiceli:
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
The description is meaningless.

, percent-------------which is impossible for "saline solution".
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = quarts of salt in original saline solution
After adding quarts of water:

--------------

The concentration of the 1st solution in 55%
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