SOLUTION: How many liters of water must be added to 70L of a 40% acid solution in order to procude a 28% acid solution?

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Question 530389: How many liters of water must be added to 70L of a 40% acid solution in order to procude a 28% acid solution?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(40%)(70) = (28%)(70 + x)