document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=222840>Question 222840</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I really need help setting up the equation to solve the following problem more than anything. Once I get there, hopefully I will be able to get it.  Could you please help me set up the following word problem?\r<BR>\n" );
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document.write( "2 trains leave the depot at the same time, one traveling north and the other south.  The speed of one train is 15 MPH slower than the other.  If after 3 hours, the distance between trains is 315 miles, what is the speed of each train?\r<BR>\n" );
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document.write( "all I can think of is, ( x= y-15) but I'm not even sure if that's correct. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #166748 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=166748\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2 trains leave the depot at the same time, one traveling north and the other south. The speed of one train is 15 MPH slower than the other. If after 3 hours, the distance between trains is 315 miles, what is the speed of each train? <BR>\n" );
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document.write( "1st train DATA:<BR>\n" );
document.write( "rate = x-15 mph ; time = 3 hrs. ; distance = rt = 3(x-15) miles<BR>\n" );
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document.write( "2nd train DATA:<BR>\n" );
document.write( "rate = x mph ; time = 3 hrs. ; distance = rt = 3x<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "distance + distance = 315 miles<BR>\n" );
document.write( "3(x-15)+3x = 315<BR>\n" );
document.write( "6x - 45 = 315<BR>\n" );
document.write( "6x = 360<BR>\n" );
document.write( "x = 60 mph (speed of the faster train)<BR>\n" );
document.write( "x-15 = 45 mph (speed of the slower train)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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