document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=637623>Question 637623</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two Trains left a station at the same time. One, Train A, traveled north at a certain speed and the other, Train B, traveled south at twice the speed. After 4 hours, the trains were 600 miles apart. How fast was each train traveling? Use needs to input the initial speed of train a to being the simulation.<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 #401816 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley79><B>checkley79(3341)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley79><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=401816\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D+RT<BR>\n" );
document.write( "600=(x+2x)4<BR>\n" );
document.write( "600=3x*4<BR>\n" );
document.write( "600=12x<BR>\n" );
document.write( "600/12=x<BR>\n" );
document.write( "x=50 mph ans. for the slower train.<BR>\n" );
document.write( "2*50=100 mph ans. for the second train.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "600=(50+100)4<BR>\n" );
document.write( "600=150*4<BR>\n" );
document.write( "600=600\r<BR>\n" );
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