document.write( "Question 1059114: A boat moves 7 kilometers upstream
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Algebra.Com's Answer #674206 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "                 SPEED       TIME      DISTANCE\r\n" );
document.write( "UPSTREAM          r-5         t           7\r\n" );
document.write( "DOWNSTREAM        r+5         t          20\r\n" );
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\n" ); document.write( "\n" ); document.write( "The problem form is so common, I will generalize.
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document.write( "                 SPEED       TIME      DISTANCE\r\n" );
document.write( "UPSTREAM          r-c         t           p\r\n" );
document.write( "DOWNSTREAM        r+c         t           d\r\n" );
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document.write( "p is for distance uPstream and d is distance Downstream.\r\n" );
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document.write( "The unknown variables are r and t.  \r\n" );
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\n" ); document.write( "\n" ); document.write( "You can form an equation because t is the same number for both directions and according to the constant travel rates rule.\r
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