SOLUTION: Joan mixed 11 mL of an acidic solution with 8 mL of a 42% acidic solution, to make a 43% acidic solution. Find the percent acid concentration of the first solution.

Question 1017265: Joan mixed 11 mL of an acidic solution with 8 mL of a 42% acidic solution, to make a 43% acidic solution. Find the percent acid concentration of the first solution.
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
c, the concentration of the first solution to be used

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