SOLUTION: You have 10 cups of a drink that contains 76% water. How many cups of a drink containing 70% water needs to be added in order to have a final drink that is 74% water?

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Question 1115612: You have 10 cups of a drink that contains 76% water. How many cups of a drink containing 70% water needs to be added in order to have a final drink that is 74% water?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
x cups of the 70%water to add
10%2A76%2Bx%2A70=74%28x%2B10%29
70x%2B760=74x%2B740
4x=20
x=5