document.write( "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 \n" ); document.write( "

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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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\n" ); document.write( "let x=amt of 60% solution that needs to be drained and replaced with pure water.
\n" ); document.write( "12-x=amt of remaining 60% solution
\n" ); document.write( "60%(12-x)=50%*12
\n" ); document.write( "7.2-.6x=6
\n" ); document.write( "x=2
\n" ); document.write( "amt of 60% solution that needs to be drained and replaced with pure water=2 quarts \n" ); document.write( "

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