document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=775440>Question 775440</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The cooling system in a truck contains of 4 gallon of coolant that is 30% antifreeze.  How much must be withdrawn and replaced with 100% antifreeze to bring  the coolant in the system to 50% antifreeze? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #472873 by </B><A HREF=/tutors/aboutme.mpl?userid=sofiyac><B>sofiyac(983)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sofiyac><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=sofiyac><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=472873\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let's say we need x gallons of 100% antifreeze so<BR>\n" );
document.write( "4(30)-x(40)+x(100)=4(50)<BR>\n" );
document.write( "120-40x+100x=200<BR>\n" );
document.write( "60x=80 divide each side by 60<BR>\n" );
document.write( "x=8/6=4/3 of a gallon or 1.33333 gallons </SPAN>\n" );
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