document.write( "Question 27787: How far can a man walk into the country at the rate of 4mph if he rides back at the rate of 20 mph and his total time is 8 hours? \n" ); document.write( "
Algebra.Com's Answer #15123 by Paul(988)\"\" \"About 
You can put this solution on YOUR website!
Let the distance be x
\n" ); document.write( "\"x%2F4-x%2F20=8\"
\n" ); document.write( "Multiply the whole equation by 20
\n" ); document.write( "\"20%28x%2F4%29-20%28x%2F20%29=20%288%2F1%29\"
\n" ); document.write( "5x-x=160
\n" ); document.write( "4x=160
\n" ); document.write( "x=40\r
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\n" ); document.write( "\n" ); document.write( "Hence, a person can walk for 40 milies.
\n" ); document.write( "paul.
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