document.write( "Question 662020: A radiator contains 8 quarts of fluid, 20% of which is antifreeze. How much fluid should be drained and replaced with pure antifreeze so that the new mixture is 25% antifreeze? (Round your answer to two decimal places.) \n" ); document.write( "

Algebra.Com's Answer #411915 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = quarts of fluid to be drained
\n" ); document.write( "and replaced with pure antifreeze
\n" ); document.write( " $\"+.2%2A8+=+1.6+\"$ quarts of antifreeze to start with
\n" ); document.write( "--------------
\n" ); document.write( " $\"+%281.6+-+.2x+%2B+x+%29+%2F+8+=+.25+\"$
\n" ); document.write( " $\"+%28+1.6+%2B+.8x+%29+%2F+8+=+.25+\"$
\n" ); document.write( " $\"+1.6+%2B+.8x+=+.25%2A8+\"$
\n" ); document.write( " $\"+1.6+%2B+.8x+=+2+\"$
\n" ); document.write( " $\"+.8x+=+.4+\"$
\n" ); document.write( " $\"+x+=+.5+\"$
\n" ); document.write( "1/2 quart of fluid is to be drained
\n" ); document.write( "and replaced with pure antifreeze
\n" ); document.write( " \n" ); document.write( "

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