document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=881635>Question 881635</A>: <I><SPAN STYLE=\"word-break: break-all;\"> jack can clean the house in 12 hours, sam can do the same job in 9 hours. How long would it take if they worked together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #532363 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=532363\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F12+%2B+1%2F9+=+1%2Fx ALIGN=MIDDLE  ALT=\"1%2F12+%2B+1%2F9+=+1%2Fx\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  3x + 4x = 36<BR>\n" );
document.write( "    7x = 36<BR>\n" );
document.write( "     x = 36/7= 5 1/7 hr </SPAN>\n" );
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