SOLUTION: 12 gallons of 55% acid solution was mixed with 8 gallons of pure water. What is the concentration of the mixture.

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Question 752121: 12 gallons of 55% acid solution was mixed with 8 gallons of pure water. What is the concentration of the mixture.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+.55%2A12+=+6.6+ gallons of acid in 55% solution
The concentration is:
+6.6+%2F+%28+12+%2B+8+%29+=+6.6+%2F+20+
+6.6+%2F+20+=+.33+
33%