document.write( "Question 486071: One gallon container is full of a 75% alcohol solution. How much must be drained off and replaced by a 50% alcohol solution to produce one gallon of 65% alcohol solution? \n" ); document.write( "
Algebra.Com's Answer #332325 by jorel1380(3719)\"\" \"About 
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1x.65=.65
\n" ); document.write( ".75n+(.75-.5)(1-n)=.65
\n" ); document.write( ".75n+.25-.25n=.65
\n" ); document.write( ".5n=.40
\n" ); document.write( "n=.40/.5=.8
\n" ); document.write( "1-n=.2
\n" ); document.write( ".75(.8)=.6
\n" ); document.write( "+.25(.2)=.05
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\n" ); document.write( "\"\"\"\"\"\"\"\".65
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\n" ); document.write( ".2 gallons must be drained off and replaced by .50 alcohol to make the mix..
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