document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=836146>Question 836146</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels <BR>\n" );
document.write( "20<BR>\n" );
document.write( " miles per hour faster than the westbound train. If the two trains are <BR>\n" );
document.write( "640<BR>\n" );
document.write( " miles apart after <BR>\n" );
document.write( "4<BR>\n" );
document.write( " hours, what is the rate of the eastbound train?<BR>\n" );
document.write( "Do not do any rounding.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #504002 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley79><B>checkley79(3341)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley79><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=504002\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> LET X BE THE SPEED OF THE EAST BOUND TRAIN<BR>\n" );
document.write( "LET X-20 BE THE SPEED OF THE WEST BOUND TRAIN<BR>\n" );
document.write( "4[X+(X-20)]=640<BR>\n" );
document.write( "4[2X-20]=640<BR>\n" );
document.write( "8X-80=640<BR>\n" );
document.write( "8X=640+80<BR>\n" );
document.write( "8X=720<BR>\n" );
document.write( "X=720/8<BR>\n" );
document.write( "X=90 MPH FOR THE EAST BOUND TRAIN<BR>\n" );
document.write( "90-20=70 MPH FOR THE WEST BOUND TRAIN<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "4[90+70]=640<BR>\n" );
document.write( "4*160=640<BR>\n" );
document.write( "640=640 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );