SOLUTION: How many quarts of pure antifreeze must be added to 8 quarts of a 10% antifreeze solution to obtain a 60% antifreeze solution?

Question 709962: How many quarts of pure antifreeze must be added to 8 quarts of a 10% antifreeze solution to obtain a 60% antifreeze solution?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
So you want to remove v gallons of the low concentration mixture of antifreeze and replace it with v gallons of the pure 100% antifreeze. You want the finished volume to be the same as before. The current concentration as percent in the tank is and you want a finished concentration.

Find v.
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