document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=891494>Question 891494</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It takes 9 hours to fill a pool with the inlet pipe. It can be emptied in 12 hours with the outlet pipe. If the pool is 1/2 full to begin with, how long will it take to fill it from there if both pipes are open? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #539803 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=539803\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The student says 1/2 full.<BR>\n" );
document.write( "1/9-1/12=1/2x<BR>\n" );
document.write( "12/108-9/108=1/2x<BR>\n" );
document.write( "3/108=1/2x<BR>\n" );
document.write( "2/36=1/x<BR>\n" );
document.write( "1/18=1/x<BR>\n" );
document.write( "x=18\r<BR>\n" );
document.write( "\n" );
document.write( "If it were empty <BR>\n" );
document.write( "1/9-1/12=1/x<BR>\n" );
document.write( "3/108=1/x<BR>\n" );
document.write( "x=36<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );