document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=164965>Question 164965</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0028253264/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Weighted Averages.\r<BR>\n" );
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document.write( "A car radiator has a capacity of 14 quarts and is filled with a 20% antifreeze solution. How much must be drained off and replaced with pure antifreeze to obtain a 40% antifreeze solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #121583 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=121583\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Let x = amount drained and replaced w/pure antifreeze<BR>\n" );
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document.write( "\"antifreeze left\" + \"added antifreeze\" = \"antifreeze in new mixture\"<BR>\n" );
document.write( ".20(14-x) + x = .40(14)<BR>\n" );
document.write( "2.8 - .20x + x = 5.6<BR>\n" );
document.write( ".80x = 2.8<BR>\n" );
document.write( "x = 3.5 quarts <BR>\n" );
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