document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=243143>Question 243143</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a train leaves the station traveling west at 50 mph.  One hour later a second train leaves the station traveling west on the same track traveling 65 mph.  How many hours will it take the second train to crash into the back of the first train </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #178159 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=178159\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> d=rt<BR>\n" );
document.write( "d=50t<BR>\n" );
document.write( "d=65(t-1)<BR>\n" );
document.write( "50t=65(t-1)<BR>\n" );
document.write( "50t=65t-65<BR>\n" );
document.write( "50t-65t=-65<BR>\n" );
document.write( "-15t=-65<BR>\n" );
document.write( "t=-65/-15<BR>\n" );
document.write( "t=13/3 or 4 1/3 hours after the first train leaves the station they will crash.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "50*13/3=65(13/3-1)<BR>\n" );
document.write( "650/3=65(13/3-3/3)<BR>\n" );
document.write( "650/3=65(10/3)<BR>\n" );
document.write( "650/3=650/3 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );