SOLUTION: How much water should be added to 64 ounces of a 10% salt solution to make a 2% salt solution?

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Question 349603: How much water should be added to 64 ounces of a 10% salt solution to make a 2% salt solution?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let A be the amount of water (0% solution) added.
0%28A%29%2B10%2864%29=2%28A%2B64%29
640=2A%2B128
2A=512
highlight%28A=256%29ounces