document.write( "Question 156552: Need help with setting up formula for: An express train is 19mph faster than a freight train. The express train travels 420 miles in the same time that it takes the freight train to travel 300 miles. Find the speed of each train. \n" ); document.write( "

Algebra.Com's Answer #115299 by oscargut(2103) $\"\"$ $\"About$

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Let x = speed of the express train
\n" ); document.write( "Let y = speed of the freight train
\n" ); document.write( "An express train is 19mph faster than a freight train.
\n" ); document.write( "then $\"x=y%2B19\"$
\n" ); document.write( "The express train travels 420 miles in the same time that it takes the freight train to travel 300 miles
\n" ); document.write( "then $\"420%2Fx+=300%2Fy\"$ \r
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