document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=765058>Question 765058</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A farmer can fplow the filed in 8 days. After working for 3 days,the son joins him amd together the plow the field in 3 more days. How many days will it require for the son to plow the field alone? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #465954 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39615)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=465954\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> THREE MAIN PARTS OF THE FIELD-PLOWING.\r<BR>\n" );
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document.write( "FATHER FOR 3 DAYS\r<BR>\n" );
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document.write( "Rate is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F8 ALIGN=MIDDLE  ALT=\"1%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" > job per day.  We can find how much job was done and what still needs to be done.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F8%29%2A3 ALIGN=MIDDLE  ALT=\"%281%2F8%29%2A3\"   DISABLED_style= \"max-width:90%; height:auto;\" > job was done.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1-%281%2F8%29%2A3 ALIGN=MIDDLE  ALT=\"1-%281%2F8%29%2A3\"   DISABLED_style= \"max-width:90%; height:auto;\" > job still needs to be done.<BR>\n" );
document.write( "That is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%285%2F8%29 ALIGN=MIDDLE  ALT=\"highlight%285%2F8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > job still needs to be done.\r<BR>\n" );
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document.write( "FATHER & SON FINISH\r<BR>\n" );
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document.write( "They plow the field in 3 days, suggesting they finished the field.  We do not know their combined rate nor the son's but we can use a variable for the son's rate. \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F8%2Br%29%2A3=5%2F8 ALIGN=MIDDLE  ALT=\"%281%2F8%2Br%29%2A3=5%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" > using r for the son's rate of work, allows us to find the son's rate if he were to work alone.<BR>\n" );
document.write( "Solve for r.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3r%2B3%2F8=5%2F8 ALIGN=MIDDLE  ALT=\"3r%2B3%2F8=5%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3r=5%2F8-3%2F8 ALIGN=MIDDLE  ALT=\"3r=5%2F8-3%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3r=1%2F4 ALIGN=MIDDLE  ALT=\"3r=1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28r=1%2F12%29 ALIGN=MIDDLE  ALT=\"highlight%28r=1%2F12%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > which means, the son could plow the field alone in 12 days.\r<BR>\n" );
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document.write( "SON ALONE TO FINISH\r<BR>\n" );
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document.write( "Right!  Already answered.  The rate for the son is 1/12 job per day or as the reciprocal, 12 days to plow the field himself. </SPAN>\n" );
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