document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=123712>Question 123712</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One pipe can fill a tank in 24 minutes. A second pipe can fill it in 8 minutes and a third pipe can fill it in 12 minutes.  If the tank is empty, how long will the three pipes operating together take to fill it?\r<BR>\n" );
document.write( "\n" );
document.write( "____minutes\r<BR>\n" );
document.write( "\n" );
document.write( "**THANKS** </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #90822 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=90822\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> each pipe fills some fraction of the tank, based on the combined time\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "if the combined time were 12 minutes, then the first pipe would fill 12/24 or half of the tank\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "let x=\"combined time\" __ (x/24)+(x/8)+(x/12)=1\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "multiplying by 24 __ x+3x+2x=24 __ 6x=24 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );