document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=828250>Question 828250</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A and B can do a piece of work in 6 days, B and C can do it in 10 days and C and A can do it in 15 days.<BR>\n" );
document.write( "(a)In how many days will A, B and C finish it working together?<BR>\n" );
document.write( "(b)In how many days will A and B finish their working alone? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #514618 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=514618\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1)1/a+1/b    =1/6,<BR>\n" );
document.write( "2)    1/b+1/c=1/10,<BR>\n" );
document.write( "add <BR>\n" );
document.write( "1/a+2/b+1/c=1/6+1/10<BR>\n" );
document.write( "3)1/a    +1/c=1/15,<BR>\n" );
document.write( "subtract<BR>\n" );
document.write( "2/b=1/6+1/10-1/15<BR>\n" );
document.write( "b=10\r<BR>\n" );
document.write( "\n" );
document.write( "1/a+1/10=1/6<BR>\n" );
document.write( "1/a+3/30=5/30<BR>\n" );
document.write( "1/a=2/30=1/15<BR>\n" );
document.write( "a=15<BR>\n" );
document.write( "1/c=0<BR>\n" );
document.write( "c=undefined\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "1/a+1/b+1/c=1/x\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );