document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=60>Question 60</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Afreight train and an express train leave towns 390km apart, traveling toward one another. The freight train travels 30km per hr slower than the express train. They pass another 3 hr. later. What are their speeds! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #27 by </B><A HREF=/tutors/aboutme.mpl?userid=ichudov><B>ichudov(507)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ichudov><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=ichudov><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=27\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is a typical travel problem. It asks us for their speeds, so, we need to find them! Denote speed of the express train as E, and speed of the freight train as F. \r<BR>\n" );
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document.write( "F=E-30<BR>\n" );
document.write( "3*(F+E) = 390\r<BR>\n" );
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document.write( "OR\r<BR>\n" );
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document.write( "E-F=30<BR>\n" );
document.write( "3E+3F = 390\r<BR>\n" );
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document.write( "it is a simple linear system, for which I have a solver that shows work. </SPAN>\n" );
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