document.write( "Question 662359: A radiator contains 12 quarts of fluid, 15% of which is antifreeze. How much fluid should be drained and replaced with pure antifreeze so that the new mixture is 35% antifreeze? (Round your answer to two decimal places.)
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Algebra.Com's Answer #412160 by lwsshak3(11628)\"\" \"About 
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A radiator contains 12 quarts of fluid, 15% of which is antifreeze. How much fluid should be drained and replaced with pure antifreeze so that the new mixture is 35% antifreeze? (Round your answer to two decimal places.)
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\n" ); document.write( "let x=amt of fluid to be drained and replaced with pure antifreeze.
\n" ); document.write( "12-x=amt of fluid remaining in radiator
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\n" ); document.write( "15%(12-x)+100%x=35%*12
\n" ); document.write( "1.8-.15x+x=4.2
\n" ); document.write( ".85x=2.4
\n" ); document.write( "x=2.4/.85
\n" ); document.write( "x=2.82
\n" ); document.write( "amt of fluid to be drained and replaced with pure antifreeze=2.82 quarts
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