SOLUTION: In mixing a weed-killing chemical, a 20% solution of the chemical is mixed with a 75% solution to get 55L of a 55% solution. How much of each solution is needed?

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Question 951994: In mixing a weed-killing chemical, a 20% solution of the chemical is mixed with a 75% solution to get 55L of a 55% solution. How much of each solution is needed?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
v is volume of the 75% weedkiller.

%28%2855-v%29%2A20%2Bv%2A75%29%2F55=55