document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=66436>Question 66436</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A 12 quart cooling system is filled with a solution that is 10% antifreeze. The desired strength of the solution is 40% antifreeze.  How many quarts of solution need to be drained and replaced with pure antifreeze to reach the desired strength? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #47128 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=47128\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = the amount of mixture I want to remove<BR>\n" );
document.write( "Then .1*x = the amount of antifreeze in the mixture<BR>\n" );
document.write( "Then x = the amount of antifreeze I want to put back in,<BR>\n" );
document.write( "making 12 = the amount of mixture once again<BR>\n" );
document.write( "stated in a formula,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28.1%2A12+-+.1%2Ax+%2B+x%29+%2F+12+=+.4 ALIGN=MIDDLE  ALT=\"%28.1%2A12+-+.1%2Ax+%2B+x%29+%2F+12+=+.4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281.2+%2B+.9x%29+%2F+12+=+.4 ALIGN=MIDDLE  ALT=\"%281.2+%2B+.9x%29+%2F+12+=+.4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4.8+=+1.2+%2B+.9x ALIGN=MIDDLE  ALT=\"4.8+=+1.2+%2B+.9x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.9x+=+3.6 ALIGN=MIDDLE  ALT=\".9x+=+3.6\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+4 ALIGN=MIDDLE  ALT=\"x+=+4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I say that 4 quarts of 10% mixture must be removed and<BR>\n" );
document.write( "replaced with pure antifreeze. Check this<BR>\n" );
document.write( "4 + 8 = 12, so<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284+%2B+.1%2A8%29+%2F+12+=+.4 ALIGN=MIDDLE  ALT=\"%284+%2B+.1%2A8%29+%2F+12+=+.4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4.8+%2F+12+=+.4 ALIGN=MIDDLE  ALT=\"4.8+%2F+12+=+.4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.4+=+.4 ALIGN=MIDDLE  ALT=\".4+=+.4\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );