document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1115124>Question 1115124</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help me solve this.<BR>\n" );
document.write( "Train A leaves a station traveling at 40 mph.  Six hours later, train B leaves the same station traveling in the same direction at 60 mph.  How long does it take for train B to catch up to train A?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #730022 by </B><A HREF=/tutors/aboutme.mpl?userid=addingup><B>addingup(3677)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=addingup><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=addingup><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=730022\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 40x+(40*6) = 60x<BR>\n" );
document.write( "40x+240 = 60x<BR>\n" );
document.write( "240 = 20x<BR>\n" );
document.write( "reverse the equation to have the unknown on the left:<BR>\n" );
document.write( "20x = 240<BR>\n" );
document.write( "x = 240/20 = 12<BR>\n" );
document.write( "It will take train B 12 hours to catch up train A<BR>\n" );
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document.write( "Check:<BR>\n" );
document.write( "40x+(40*6) = 60x<BR>\n" );
document.write( "40(12)+(40*6) = 60(12)<BR>\n" );
document.write( "480+240 = 720 Correct<BR>\n" );
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