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" );
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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 #504003 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=504003\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Opposite directions, tells you sum of their distances is 640 miles at the given time of 4 hours.\r<BR>\n" );
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document.write( "Eastbound train is the FASTER one.\r<BR>\n" );
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document.write( "r = rate of the slower train.\r<BR>\n" );
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document.write( "________________speed_____________time___________distance<BR>\n" );
document.write( "EastFast________r+20______________4__________(____)<BR>\n" );
document.write( "WestSlow_________r_______________4___________(____)<BR>\n" );
document.write( "Total_____________________________________________640\r<BR>\n" );
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document.write( "Formula for uniform travel rate R*T=D gives expressions for the distances.\r<BR>\n" );
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document.write( "________________speed_____________time___________distance<BR>\n" );
document.write( "EastFast________r+20______________4______________(r+20)*4<BR>\n" );
document.write( "WestSlow_________r_______________4________________r*4<BR>\n" );
document.write( "Total_____________________________________________640\r<BR>\n" );
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document.write( "Total of distances gives equation to solve for r:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28%28r%2B20%29%2A4%2B4%2Ar=640%29 ALIGN=MIDDLE  ALT=\"highlight%28%28r%2B20%29%2A4%2B4%2Ar=640%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Once finding r, you can compute r+20. </SPAN>\n" );
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