SOLUTION: 12 gal. of a saline solution was mixed with 3 gal. of a 30% saline solution to make a 38% saline solution. Find the percent concentration of the first solution.
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Question 1015709: 12 gal. of a saline solution was mixed with 3 gal. of a 30% saline solution to make a 38% saline solution. Find the percent concentration of the first solution. Answer by fractalier(6550) (Show Source):
You can put this solution on YOUR website! Call the unknown percentage, x. We then write
12x + 3(30) = 15(38)
12x + 90 = 570
12x = 480
x = 40%
