document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1127685>Question 1127685</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A northbound train and a southbound train meet each other on parallel tracks heading in opposite directions. The northbound train travels 12 miles per hour faster than the southbound train. After 1.5 hours, they are 177 miles apart. At what speeds are the two trains traveling </SPAN>\n" );
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document.write( "The distance between the two trains is increasing at a rate of 177 miles in 1.5 hours, which is 177/1.5 = 118 miles per hour.<br><BR>\n" );
document.write( "That 118 miles per hour is the sum of the speeds of the two trains.  Since one train is traveling 12mph faster than the other, we can call the two speeds x and x+12.  Then<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2Bx%2B12+=+118 ALIGN=MIDDLE  ALT=\"x%2Bx%2B12+=+118\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x+=+106 ALIGN=MIDDLE  ALT=\"2x+=+106\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+53 ALIGN=MIDDLE  ALT=\"x+=+53\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "ANSWER:  The two speeds are x = 53mph and x+12 = 65 mph. </SPAN>\n" );
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