SOLUTION: How many gallons of a 8% salt solution must be mixed with 75 gallons of a 12% solution to obtain a 10% solution?

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Question 840866: How many gallons of a 8% salt solution must be mixed with 75 gallons of a 12% solution to obtain a 10% solution?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
v is unknown gallons of 8% to add.

%2812%2A75%2B8v%29%2F%28v%2B75%29=10
Solve for v.