SOLUTION: a solution contains 60 oz of water and 15 oz of acid. if a 60% acid solution results from water evaporation, then how many ounces of water have evaporated

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Question 797403: a solution contains 60 oz of water and 15 oz of acid. if a 60% acid solution results from water evaporation, then how many ounces of water have evaporated
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The total ounces of solution is +60+%2B+15+=+75+ oz
Let +x+ = ounces of water that evaporate
---------------
+15+%2F+%28+75+-+x+%29+=+.6+
+15+=+.6%2A%28+75+-+x+%29+
+15+=+45+-+.6x+
+.6x+=+45+-+15+
+.6x+=+30+
+x=+50+
50 ounces of water evaporate
check:
+15+%2F+%28+75+-+50+%29+=+.6+
+15+%2F+25+=+.6+
+15+=+.6%2A25+
+15+=+15+
OK