document.write( "Question 953394: a train traveled route fro city A to city B in 4 hours. If the engineer increased the speed of the train by 30 mph, The trip would only take 3 hours. How far is city A from city B? \n" ); document.write( "
Algebra.Com's Answer #582229 by ankor@dixie-net.com(22740)\"\" \"About 
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): a train traveled route fro city A to city B in 4 hours.
\n" ); document.write( " If the engineer increased the speed of the train by 30 mph, The trip would only take 3 hours.
\n" ); document.write( " How far is city A from city B?
\n" ); document.write( ":
\n" ); document.write( "let s = the slower speed
\n" ); document.write( "then
\n" ); document.write( "(s+30) = the faster speed
\n" ); document.write( ":
\n" ); document.write( "Write a distance equation, dist = time * speed
\n" ); document.write( "slow speed dist = fast speed dist
\n" ); document.write( "4s = 3(s+30)
\n" ); document.write( "4s = 3s + 90
\n" ); document.write( "4s - 3s = 90
\n" ); document.write( "s = 90 mph
\n" ); document.write( "Find the dist
\n" ); document.write( "4 * 90 = 360 mi
\n" ); document.write( "Check the distance
\n" ); document.write( "3 * 120 = 360 mi \n" ); document.write( "
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