SOLUTION: How much water must be added to 20 ounces of a 60% saline solution to obtain a 45% saline solution?

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Question 534837: How much water must be added to 20 ounces of a 60% saline solution to obtain a 45% saline solution?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = ounces of water to be added
given:
Salt in 60% solution = +.6%2A20+=+12+ ounces
+12+%2F+%28+20+%2B+x+%29+=+.45+
+12+=+.45%2A%28+20+%2B+x+%29+
+12+=+9+%2B+.45x+
+.45x+=+3+
+x+=+6.666+
6.666 ounces of water should be added