document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=400353>Question 400353</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The cooling system in a truck contains 4 gallons of coolant that is 30% antifreeze. How much must be withdrawn and replace with 100% antifreeze to bring the coolant in the system to 50% antifreeze?\r<BR>\n" );
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document.write( "I have no idea where to start.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #283424 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=283424\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The cooling system in a truck contains 4 gallons of coolant that is 30% antifreeze. How much must be withdrawn and replace with 100% antifreeze to bring the coolant in the system to 50% antifreeze?\r<BR>\n" );
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document.write( "let x=gallons of 30% coolant to be removed and replaced with 100% antifreeze.<BR>\n" );
document.write( "then 4-x gallons of 30% coolant remains initially<BR>\n" );
document.write( "then adding x gallons of 100% antifreeze will give a 50% antifreeze coolant\r<BR>\n" );
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document.write( ".3(4-x)+100%x=.5*4<BR>\n" );
document.write( "1.2-.3x+x=2<BR>\n" );
document.write( ".7x=.8<BR>\n" );
document.write( "x=8/7 gal<BR>\n" );
document.write( "ans: 8/7 gal of 30% antifreeze coolant must be removed and replaced with 100% antifreeze to bring the coolant in the system to 50% antifreeze?<BR>\n" );
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