document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=529683>Question 529683</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having trouble setting up an equation for the following: Together Bob and Dave can roof a house in 16 hours. By himself, Bob can roof the house in 4 hours less time than Dave can by himself. How long will it take Dave to roof the house by himself? \r<BR>\n" );
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document.write( "I am currently studying Quadratic equations and Radicals, so the answer to this might be in Radical form. I tried to assign x to Dave's time, and x-4 to Bob's time, and then average the sum of these. I then made this equal to 16, but I got 18 hours for Dave, and 14 for Bob, which is faster than the 2 of them working together (16)! Any help would be appreciated,\r<BR>\n" );
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document.write( "Thank you,<BR>\n" );
document.write( "Kevin </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #349663 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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/cgi-bin/show-face.mpl?user=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=349663\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> they each do some FRACTION of the job, based on their individual rates<BR>\n" );
document.write( "___ the fractions sum to one, the WHOLE job\r<BR>\n" );
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document.write( "(16 / x) + [16 / (x - 4)] = 1\r<BR>\n" );
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document.write( "multiplying by the LCD will generate your quadratic </SPAN>\n" );
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