SOLUTION: A 12-qt cooling system is checked and found to be filled with 25% antifreeze. The desired strength is 50% antifreeze. How many quarts need to be drained and replaced with pure anti

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Question 850759: A 12-qt cooling system is checked and found to be filled with 25% antifreeze. The desired strength is 50% antifreeze. How many quarts need to be drained and replaced with pure antifreeze to reach the desired strength?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
12/4+x=12/2
3+x=6
x=3 qts