SOLUTION: A doctor has a 2 liter solution of 3% boric acid. How much of a 10% solution of the acid must she add to have a 4% solution?

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Question 376235: A doctor has a 2 liter solution of 3% boric acid. How much of a 10% solution of the acid must she add to have a 4% solution?
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
first mixture + second mixture = total mixture
2(0.03) + 0.10(x) = 0.04(x + 2)

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