SOLUTION: Hi i am having trouble with this mixture problem. How many ounces of pure water must be added to 60oz of an 8% salt solution to make a 3% salt solution?

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Question 499007: Hi i am having trouble with this mixture problem.
How many ounces of pure water must be added to 60oz of an 8% salt solution to make a 3% salt solution?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
In words:
( ounces of salt you end up with ) / ( total ounces of solution ) = 3%
Let w = ounces of water to be added
given:
+.08%2A60+=+4.8+ = ounces of salt in 8% solution
---------------
+4.8+%2F+%28+60+%2B+w+%29+=+.03+
+4.8+=+.03%2A%28+60+%2B+w+%29+
+4.8+=+1.8+%2B+.03w+
+.03w+=+4.8+-+1.8+
+.03w+=3+
+w+=+100+
100 ounces of pure water must be added