SOLUTION: Suppose that 15 gallons of a 15% salt solution are mixed with 20 gallons of a 29% salt solution. What is the percent of salt in the resulting solution?

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Question 806324: Suppose that 15 gallons of a 15% salt solution are mixed with 20 gallons of a 29% salt solution. What is the percent of salt in the resulting solution?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The gallons of salt in the 15% solution is
+.15%2A15+=+2.25+
The gallons of salt in the 29% solution is
+.29%2A20+=+5.8+
-----------------
+%28+2.25+%2B+5.8+%29+%2F+%28+15+%2B+20+%29+=+8.05+%2F+35+
+8.05+%2F+35+=+.23+
+.23%2A100+=+23+
The % salt is 23%