document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=313761>Question 313761</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mr. Abbot left Farmersville in a plane at noon to travel to Exeter. Mr. Baker left Exeter in his automobile at 2pm to travel to Farmersville. It is 400 mi from Exeter to Farmersville. If the sum of their speeds was 120mph, and if they crossed paths at 4pm, find the speed of each.\r<BR>\n" );
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document.write( "x= speed of plane<BR>\n" );
document.write( "y= speed if automobile\r<BR>\n" );
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document.write( "The system is <BR>\n" );
document.write( "x+y=400<BR>\n" );
document.write( "4x+4y=120 </SPAN>\n" );
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document.write( "x= speed of plane<BR>\n" );
document.write( "y= speed if automobile\r<BR>\n" );
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document.write( "x+y=120<BR>\n" );
document.write( "4x+2y=400 ( he leaves at 2.00 pm)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "4x+4y-4x-2y=480-400<BR>\n" );
document.write( "2y=80<BR>\n" );
document.write( "y=40 mph speed of car.<BR>\n" );
document.write( "x+y=120<BR>\n" );
document.write( "so x 80 mph. </SPAN>\n" );
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