document.write( "Question 462379: Two trains are 330 miles apart, and their speeds differ by 20 mph. They travel toward each other and meet in 3 hrs. Find the speed of each train. \r
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document.write( "I'm having trouble putting this problem into an equation.
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document.write( "It's different from the other travel/distance questions i've had.
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document.write( "I understand if i'm given the mph for each train but i don't know how to find it in this problem. \r
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Algebra.Com's Answer #316989 by amoresroy(361) You can put this solution on YOUR website! Two trains are 330 miles apart, and their speeds differ by 20 mph. They travel toward each other and meet in 3 hrs. Find the speed of each train. \r \n" ); document.write( "\n" ); document.write( "I'm having trouble putting this problem into an equation. \n" ); document.write( "It's different from the other travel/distance questions i've had. \n" ); document.write( "I understand if i'm given the mph for each train but i don't know how to find it in this problem. \r \n" ); document.write( "\n" ); document.write( "Let x = the speed of the slower train in mph \n" ); document.write( " x+20 = the speed of the faster train in mph\r \n" ); document.write( "\n" ); document.write( "speed times time = distance\r \n" ); document.write( "\n" ); document.write( "(x + x+20)*3 = 330 \n" ); document.write( "2x + 20 = 110 \n" ); document.write( "2x = 90 \n" ); document.write( "x = 45 \n" ); document.write( "x+20 = 65\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The speed of each train is 45mph and 65 mph.\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |