SOLUTION: how many liters of 30% chemical solution must be mixed with 30 liters of 70% solution to get a 60% mixture?

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Question 717999: how many liters of 30% chemical solution must be mixed with 30 liters of 70% solution to get a 60% mixture?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Let v be how much of the 30% chemical solution to use.
%2830v%2B70%2A30%29%2F%2830%2Bv%29=60
Find v.