document.write( "Question 266105: The question is: Two cars start at the same point and travel in opposite directions. One car travels 5 mph faster than the other car. After 4 hrs, the two cars are 420 miles apart. Find the speed of each car. \r
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document.write( " One set of equations I tried was x+y=4, 5x+y=420, and another set was x+y=420, 5x+4y=420. I was unable to get the correct answers with either set of equations. Thanks for your help!! \n" );
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Algebra.Com's Answer #195532 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Two cars start at the same point and travel in opposite directions. One car travels 5 mph faster than the other car. After 4 hrs, the two cars are 420 miles apart. Find the speed of each car. \n" ); document.write( "-------------------- \n" ); document.write( "Their combined speed is 420/4 = 105 mph \n" ); document.write( "x + y = 105 (combined) \n" ); document.write( "x - y = 5 (difference) \n" ); document.write( "-------------------------- Add \n" ); document.write( "2x = 110 \n" ); document.write( "x = 55 \n" ); document.write( "Speeds = 55 and 50\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |