SOLUTION: The Cooling system of a certain car has a capacity of 4 gallons and is currently filled with a 45% mixture of antifreeze. How much of this mixture must be drained and replaced with
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Question 897822: The Cooling system of a certain car has a capacity of 4 gallons and is currently filled with a 45% mixture of antifreeze. How much of this mixture must be drained and replaced with pure antifreeze so that the resulting mixture is 67% antifreeze? Answer by richwmiller(17219) (Show Source):