SOLUTION: A chemist has one solution of 20% acid and another of 50% acid. how many millimeters of each are needed to obtain 30 ml of 30% acid?

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Question 955364: A chemist has one solution of 20% acid and another of 50% acid. how many millimeters of each are needed to obtain 30 ml of 30% acid?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
v for how much of the 20% acid, meaning (30-v) is the amount of the 50% acid.
%2820v%2B50%2830-v%29%29%2F30=30