SOLUTION: How much water must be added to 6 ounces of a 20% acid solution to obtain a 15% acid solution?

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Question 757755: How much water must be added to 6 ounces of a 20% acid solution to obtain a 15% acid solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
the water, w.

6%2A20%2F%286%2Bw%29=15