document.write( "Question 662267: A radiator contains 15 quarts of fluid, 30% of which is antifreeze. How much fluid should be drained and replaced with pure antifreeze so that the new mixture is 55% antifreeze? \n" ); document.write( "

Algebra.Com's Answer #412063 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "A radiator contains 15 quarts of fluid, 30% of which is antifreeze. 
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document.write( "How much fluid should be drained and 
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document.write( "replaced with pure antifreeze so that the new mixture is 55% antifreeze?
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document.write( " x + .30(15-x) = .55*15
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document.write( "     .70x = .25*15
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document.write( "        x = .25*15/.70
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