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) You can put this solution on YOUR website! 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 \n" ); document.write( "--------------- \n" ); document.write( "\"\"\"\"\"\"\"\".65 \n" ); document.write( "------------------ \n" ); document.write( "--------------------- \n" ); document.write( ".2 gallons must be drained off and replaced by .50 alcohol to make the mix.. \n" ); document.write( " |