document.write( "Question 203510: Could someone help me with this one? I have trouble with word problems? You are greatly appreciated.\r
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document.write( "An express train and a local train both leave Gray’s Lake at 12:00 noon and head for Chicago 60 miles away. The express travels twice as fast as the local and arrives 2 hours ahead of it. Find the speed of each train. \r
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Algebra.Com's Answer #153583 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! An express train and a local train both leave Gray’s Lake at 12:00 noon and head \n" ); document.write( " for Chicago 60 miles away. The express travels twice as fast as the local and \n" ); document.write( " arrives 2 hours ahead of it. Find the speed of each train. \n" ); document.write( ": \n" ); document.write( "Let s = speed of the freight \n" ); document.write( "then \n" ); document.write( "2s = speed of the express \n" ); document.write( ": \n" ); document.write( "Write a time equation: Time = \n" ); document.write( "Freight time = Express time + 2 hrs \n" ); document.write( " \n" ); document.write( "Multiply equation by 2s, results: \n" ); document.write( "2(60) = 60 + 2(2s) \n" ); document.write( "120 = 60 + 4s \n" ); document.write( "120 - 60 = 4s \n" ); document.write( "60 = 4s \n" ); document.write( "s = \n" ); document.write( "s = 15 mph is the freight, \n" ); document.write( "then \n" ); document.write( "2(15) = 30 mph is express \n" ); document.write( "; \n" ); document.write( ": \n" ); document.write( "Check solution by finding the time of each train \n" ); document.write( "60/15 = 4 hr \n" ); document.write( "60/30 = 2 hr \n" ); document.write( "------------ \n" ); document.write( "differ = 2 hrs \n" ); document.write( " \n" ); document.write( " |