document.write( "Question 675643: a small plane leaves the airport at the same time a train leaves the same location. the plane flies 120 mph faster than the train. two hours after their departure the train and plane are 420 miles apart. find the speed of each and show the equation. \n" ); document.write( "
Algebra.Com's Answer #419973 by stanbon(75887)\"\" \"About 
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a small plane leaves the airport at the same time a train leaves the same location. the plane flies 120 mph faster than the train. two hours after their departure the train and plane are 420 miles apart. find the speed of each and show the equation.
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\n" ); document.write( "Train DATA:
\n" ); document.write( "rate = x mph ; time = 2 hrs ; distance = 2x miles
\n" ); document.write( "-----
\n" ); document.write( "Plane DATA:
\n" ); document.write( "rate = x+120 mph ; time = 2 hrs ; distance 2x+240 miles
\n" ); document.write( "-----------
\n" ); document.write( "Equation:
\n" ); document.write( "distance + distance = 420 miles
\n" ); document.write( "2x + 2x+240 = 420
\n" ); document.write( "4x = 180
\n" ); document.write( "x = 45 mph (train rate)
\n" ); document.write( "---
\n" ); document.write( "x+120 = 165 mph (plane rate)
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\n" ); document.write( "cheers,
\n" ); document.write( "Stan H.
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