document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1132505>Question 1132505</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A farmer can plow a given field in 2 hours less time than it take his son.  If they acquire two tractors and work together, they can plow the field in 5 hours.  How long does I take the father alone? </SPAN>\n" );
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document.write( "Work with the fractions of the job each does in 1 hour.<br><BR>\n" );
document.write( "Let x be the number of hours the farmer takes; then x+2 is the number of hours the son takes.<br><BR>\n" );
document.write( "Then the fractions of the job each does in 1 hour are 1/x and 1/(x+2).<br><BR>\n" );
document.write( "Together they take 5 hours to do the job; so together the fraction they do together is 1/5.<br><BR>\n" );
document.write( "Then the equation is (fraction the farmer does in 1 hour) plus (fraction the son does in 1 hour) = (fraction they do together in 1 hour):<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2Fx+%2B+1%2F%28x%2B2%29+=+1%2F5 ALIGN=MIDDLE  ALT=\"1%2Fx+%2B+1%2F%28x%2B2%29+=+1%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Multiply everything by the least common denominator -- (5)(x)(x+2) -- to obtain a quadratic equation.  The quadratic doesn't factor, so you will need to solve using the quadratic formula. </SPAN>\n" );
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