SOLUTION: A 12 quart cooling system is tested and found filled with a 60 percent antifreeze solution.the ideal mixture should be a 50 percent antifreeze solution. How many quarts of solution

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Question 890213: A 12 quart cooling system is tested and found filled with a 60 percent antifreeze solution.the ideal mixture should be a 50 percent antifreeze solution. How many quarts of solution needs to be drained and replaced with pure water to reach the ideal mixture
Answer by lwsshak3(11628) (Show Source):
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A 12 quart cooling system is tested and found filled with a 60 percent antifreeze solution.the ideal mixture should be a 50 percent antifreeze solution. How many quarts of solution needs to be drained and replaced with pure water to reach the ideal mixture
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let x=amt of 60% solution that needs to be drained and replaced with pure water.
12-x=amt of remaining 60% solution
60%(12-x)=50%*12
7.2-.6x=6
x=2
amt of 60% solution that needs to be drained and replaced with pure water=2 quarts