document.write( "Question 1190897: Sam jogged to Larry's house at 8 miles per hour and borrowed Larry's scooter, riding back at 20 miles per hour. If the round trip took 7 hours, how far is it to Larry's house? Write a distance equation \n" ); document.write( "
Algebra.Com's Answer #822622 by ikleyn(52786)\"\" \"About 
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\n" ); document.write( "Sam jogged to Larry's house at 8 miles per hour and borrowed Larry's scooter,
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document.write( "Let t be the time moving at 8 miles per hour.\r\n" );
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document.write( "Then the time moving back at 20 mph is 7-t hours.\r\n" );
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document.write( "The distance equation is\r\n" );
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document.write( "    8t = 20*(7-t).\r\n" );
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document.write( "Simplify and find t\r\n" );
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document.write( "    8t = 140 - 20t\r\n" );
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document.write( "    8t + 20t = 140\r\n" );
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document.write( "       28t   = 140\r\n" );
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document.write( "         t   = 140/28 = 5 hours.\r\n" );
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document.write( "The Larry's house is  8*5 = 40 miles apart.      ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "For simple Travel & Distance problems,  see introductory lessons \r
\n" ); document.write( "\n" ); document.write( "    - Travel and Distance problems \r
\n" ); document.write( "\n" ); document.write( "    - Travel and Distance problems for two bodies moving in opposite directions \r
\n" ); document.write( "\n" ); document.write( "    - Travel and Distance problems for two bodies moving in the same direction (catching up)\r
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\n" ); document.write( "\n" ); document.write( "You will find the solutions of many similar problems there.\r
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\n" ); document.write( "\n" ); document.write( "Read them and learn once and for all from these lessons on how to solve simple Travel and Distance problems.\r
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