document.write( "Question 1138433: Kylie went on a 126 mile trip to a soccer game. On the way back, due to road construction she had to drive 21 miles per hour slower. This made the trip take 1 hour longer. How fast did she drive to the soccer game?
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Algebra.Com's Answer #756229 by josgarithmetic(39617)\"\" \"About 
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document.write( "                      SPEED       TIME             DISTANCE\r\n" );
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document.write( "GOING                   r           126/r            126\r\n" );
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document.write( "RETURN                 r-21        126/(r-21)        126\r\n" );
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document.write( "DIFFERENCE                           1\r\n" );
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\n" ); document.write( "\"126%2F%28r-21%29-126%2Fr=1\"\r
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\n" ); document.write( "\n" ); document.write( "\"r%2A126-%28%28r-21%29126%29=r%5E2-21r\"\r
\n" ); document.write( "\n" ); document.write( "\"126r-%28126%28r-21%29%29=r%5E2-21r\"
\n" ); document.write( "\"126r-126r%2B21%2A126=r%5E2-21r\"
\n" ); document.write( "\"r%5E2-21r=21%2A126\"
\n" ); document.write( "\"r%5E2-21r=42%2A63\"\r
\n" ); document.write( "\n" ); document.write( "\"r%28r-21%29=63%2A42\" two factors differ by 21\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28r=63%29\" \n" ); document.write( "
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