document.write( "Question 1202418: The freight train headed south at 9 a.m. and the express train headed north from the same station at noon. At 3 p.m., the trains were 420 miles apart. What was the speed of each if the speed of the express train was 20 mph greater than the speed of the freight train? \n" ); document.write( "
Algebra.Com's Answer #837251 by mananth(16946)\"\" \"About 
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The freight train headed south at 9 a.m. and the express train headed north from the same station at noon. At 3 p.m., the trains were 420 miles apart. What was the speed of each if the speed of the express train was 20 mph greater than the speed of the freight train?\r
\n" ); document.write( "\n" ); document.write( "Let speed of freight train be x mph
\n" ); document.write( "speed of express train = (x+20 ) mph
\n" ); document.write( "after 6 hours they were 420 miles away from each other\r
\n" ); document.write( "\n" ); document.write( "Distance = speed * time \r
\n" ); document.write( "\n" ); document.write( "They are movig away from each other. \r
\n" ); document.write( "\n" ); document.write( "6x+6(x+20)=420\r
\n" ); document.write( "\n" ); document.write( "6x+6x+120=420
\n" ); document.write( "12x =300\r
\n" ); document.write( "\n" ); document.write( "speed of freight train = 25 mph\r
\n" ); document.write( "\n" ); document.write( "speed of express train = 25+20 =45 mph\r
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