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) About Me  (Show Source):
You can put this solution on YOUR website!
0.45*4=0.67*x
1.8=0.67x
x=2.68656716 new amount
Remove 1.31343284