document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=830906>Question 830906</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A goods train travel at a constant speed covers 5 hrs, when an express train moving 20km/h faster than the goods train covers the same distance in 3 hrs. find the speed of two trains </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #500999 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</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=500999\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Basic fact:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28R%2AT=D%29 ALIGN=MIDDLE  ALT=\"highlight_green%28R%2AT=D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Let r be the speed of the goods train.<BR>\n" );
document.write( "Let d be the distance that both trains travel in their known times.  This is the same for both trains, allowing the equation of one variable only, as stated below the data table.\r<BR>\n" );
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document.write( "_________________speed____________time________________distance<BR>\n" );
document.write( "Goods_____________r________________5___________________d<BR>\n" );
document.write( "Express__________r+20______________3___________________d\r<BR>\n" );
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document.write( "Goods train:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2A5=d ALIGN=MIDDLE  ALT=\"r%2A5=d\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Express train: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28r%2B20%29%2A3=d ALIGN=MIDDLE  ALT=\"%28r%2B20%29%2A3=d\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28r%2A5=%28r%2B20%29%2A3%29 ALIGN=MIDDLE  ALT=\"highlight_green%28r%2A5=%28r%2B20%29%2A3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Solve this equation for r. </SPAN>\n" );
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