document.write( "Question 396161: A radiatior contains 6 liters of a 20% antifreeze solution. How much should be drained and replaced with pure antifeeze to produce a 50% antifreeze solution? \n" ); document.write( "
Algebra.Com's Answer #281098 by nerdybill(7384)\"\" \"About 
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A radiatior contains 6 liters of a 20% antifreeze solution. How much should be drained and replaced with pure antifeeze to produce a 50% antifreeze solution?
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\n" ); document.write( "Let x = amount (liters) removed and replaced by pure antifreeze
\n" ); document.write( "then
\n" ); document.write( ".20(6-x) + x = .50(6)
\n" ); document.write( "1.2-.2x + x = 3
\n" ); document.write( "1.2 + .8x = 3
\n" ); document.write( ".8x = 1.8
\n" ); document.write( "x = 1.8/.8
\n" ); document.write( "x = 2.25 liters\r
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