document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=179245>Question 179245</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A train leaves Chicago going west. A second train leaves Chicago going east an hour earlier. The train going west travels at 51 mph while the train going east travels 87mph. How long the train headed west leaves are the trains 439 miles apart. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #134192 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=134192\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Set up 2 equations<BR>\n" );
document.write( "For the west-bound train:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Bw%5D+=+r%5Bw%5D%2At%5Bwe%5D ALIGN=MIDDLE  ALT=\"d%5Bw%5D+=+r%5Bw%5D%2At%5Bwe%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For the East-bound train:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Be%5D+=+r%5Be%5D%2At%5Be%5D ALIGN=MIDDLE  ALT=\"d%5Be%5D+=+r%5Be%5D%2At%5Be%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "given:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5Bw%5D+=+51 ALIGN=MIDDLE  ALT=\"r%5Bw%5D+=+51\"   DISABLED_style= \"max-width:90%; height:auto;\" >mi/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5Be%5D+=+87 ALIGN=MIDDLE  ALT=\"r%5Be%5D+=+87\"   DISABLED_style= \"max-width:90%; height:auto;\" >mi/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Bw%5D+%2B+d%5Be%5D+=+439 ALIGN=MIDDLE  ALT=\"d%5Bw%5D+%2B+d%5Be%5D+=+439\"   DISABLED_style= \"max-width:90%; height:auto;\" >mi<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Bw%5D+=+439+-+d%5Be%5D ALIGN=MIDDLE  ALT=\"d%5Bw%5D+=+439+-+d%5Be%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5Be%5D+=+t%5Bw%5D+%2B+1 ALIGN=MIDDLE  ALT=\"t%5Be%5D+=+t%5Bw%5D+%2B+1\"   DISABLED_style= \"max-width:90%; height:auto;\" >hrs<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Bw%5D+=+r%5Bw%5D%2At%5Bw%5D ALIGN=MIDDLE  ALT=\"d%5Bw%5D+=+r%5Bw%5D%2At%5Bw%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Bw%5D+=+51%2At%5Bw%5D ALIGN=MIDDLE  ALT=\"d%5Bw%5D+=+51%2At%5Bw%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=439+-+d%5Be%5D+=+51t%5Bw%5D ALIGN=MIDDLE  ALT=\"439+-+d%5Be%5D+=+51t%5Bw%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(3)<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Be%5D+=+-51t%5Bw%5D+%2B+439 ALIGN=MIDDLE  ALT=\"d%5Be%5D+=+-51t%5Bw%5D+%2B+439\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Be%5D+=+r%5Be%5D%2At%5Be%5D ALIGN=MIDDLE  ALT=\"d%5Be%5D+=+r%5Be%5D%2At%5Be%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Be%5D+=+87%2A%28t%5Bw%5D+%2B+1%29 ALIGN=MIDDLE  ALT=\"d%5Be%5D+=+87%2A%28t%5Bw%5D+%2B+1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(4)<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Be%5D+=+87t%5Bw%5D+%2B+87 ALIGN=MIDDLE  ALT=\"d%5Be%5D+=+87t%5Bw%5D+%2B+87\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Since (3) and (4) are both equal to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5De%5D ALIGN=MIDDLE  ALT=\"d%5De%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <BR>\n" );
document.write( "set them equal to eachother<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-51t%5Bw%5D+%2B+439+=+87t%5Bw%5D+%2B+87 ALIGN=MIDDLE  ALT=\"-51t%5Bw%5D+%2B+439+=+87t%5Bw%5D+%2B+87\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=138t%5Bw%5D+=+439+-+87 ALIGN=MIDDLE  ALT=\"138t%5Bw%5D+=+439+-+87\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=138t%5Bw%5D+=+352 ALIGN=MIDDLE  ALT=\"138t%5Bw%5D+=+352\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5Bw%5D+=+2.55 ALIGN=MIDDLE  ALT=\"t%5Bw%5D+=+2.55\"   DISABLED_style= \"max-width:90%; height:auto;\" >hr<BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5Be%5D+=+t%5Bw%5D+%2B+1 ALIGN=MIDDLE  ALT=\"t%5Be%5D+=+t%5Bw%5D+%2B+1\"   DISABLED_style= \"max-width:90%; height:auto;\" >hrs<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5Be%5D+=+3.55 ALIGN=MIDDLE  ALT=\"t%5Be%5D+=+3.55\"   DISABLED_style= \"max-width:90%; height:auto;\" >hrs<BR>\n" );
document.write( "The trains are 439 mi apart 2.55 hrs after the westbound train leaves<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Bw%5D+=+51%2At%5Bw%5D ALIGN=MIDDLE  ALT=\"d%5Bw%5D+=+51%2At%5Bw%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Bw%5D+=+51%2A2.55 ALIGN=MIDDLE  ALT=\"d%5Bw%5D+=+51%2A2.55\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Bw%5D+=+130.1 ALIGN=MIDDLE  ALT=\"d%5Bw%5D+=+130.1\"   DISABLED_style= \"max-width:90%; height:auto;\" >mi<BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Be%5D+=+87t%5Be%5D ALIGN=MIDDLE  ALT=\"d%5Be%5D+=+87t%5Be%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Be%5D+=+87%2A3.55 ALIGN=MIDDLE  ALT=\"d%5Be%5D+=+87%2A3.55\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Be%5D+=+308.85 ALIGN=MIDDLE  ALT=\"d%5Be%5D+=+308.85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5Bw%5D+%2B+d%5Be%5D+=+439 ALIGN=MIDDLE  ALT=\"d%5Bw%5D+%2B+d%5Be%5D+=+439\"   DISABLED_style= \"max-width:90%; height:auto;\" >mi<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=130.1+%2B+308.85+=+439 ALIGN=MIDDLE  ALT=\"130.1+%2B+308.85+=+439\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=438.95+=+439 ALIGN=MIDDLE  ALT=\"438.95+=+439\"   DISABLED_style= \"max-width:90%; height:auto;\" > close enough </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );