document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=821424>Question 821424</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A 4-liter container contains a mixture with a concentration of 50%. How much of this mixture must be withdrawn and replaced by 100% concentration to bring the mixture up to 75% concentration? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #494105 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=494105\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .5*a+b=.75*4,<BR>\n" );
document.write( ".5*a+b=3,<BR>\n" );
document.write( "a+b=4<BR>\n" );
document.write( "a=2 b=2<BR>\n" );
document.write( "remove 2 liters of 50 % mixture and add 2 liters of 100%\r<BR>\n" );
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document.write( " </SPAN>\n" );
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