document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=812829>Question 812829</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a and b can do a piece of work in 18 days, b and c can do it in 24 days while c and a can finish it in 36 days . In how many days can a,b,c finish it, if they all work together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #489357 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=489357\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I know I solved this a few days ago but here we go again.<BR>\n" );
document.write( "18/a+18/b=1,<BR>\n" );
document.write( "24/b+24/c=1,<BR>\n" );
document.write( "36/a+36/c=1,<BR>\n" );
document.write( "x/a+x/b+x/c=1<BR>\n" );
document.write( "a = 48,   b = 144/5,   c = 144,   x = 16<BR>\n" );
document.write( "16 days for a b and c\r<BR>\n" );
document.write( "\n" );
document.write( "another way<BR>\n" );
document.write( "1/a+1/b    =1/18,<BR>\n" );
document.write( "    1/b+1/c=1/24,<BR>\n" );
document.write( "1/a+    1/c=1/36,<BR>\n" );
document.write( "2/a+2/b+2/c=1/8\r<BR>\n" );
document.write( "\n" );
document.write( "1/a+1/b+1/c=1/x<BR>\n" );
document.write( "x=16<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );