document.write( "Question 1056985: Boris drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 7 hours. When Boris drove home, there was no traffic and the trip only took 4 hours. If his average rate was 27 miles per hour faster on the trip home, how far away does Boris live from the mountains? \n" ); document.write( "

Algebra.Com's Answer #672053 by josgarithmetic(39617) $\"\"$ $\"About$

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document.write( "                SPEED             TIME             DISTANCE\r\n" );
document.write( "GOINGTO          r                  7               d\r\n" );
document.write( "RETURNING       r+27                4               d\r\n" );
document.write( "

\n" ); document.write( "Basic Constant Travel Rate Rule, RT=D.\r
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\n" ); document.write( "\n" ); document.write( " $\"system%28%28r%29%287%29=d%2C%28r%2B27%29%284%29=d%29\"$ \n" ); document.write( "

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