document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=33497>Question 33497</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I can't figure out the right equation for this problem...<BR>\n" );
document.write( "I tried setting it to: x/3 + x/9= 1 because similar problems in my homework used the same type of equation but it doesn't work out correctly...\r<BR>\n" );
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document.write( "A pool can be filled by a pipe in 3 hours. It takes three times as long for another pipe to empty the pool. How long will it take to fill the pool with both pipes open. <BR>\n" );
document.write( "thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #19869 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=19869\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You're on the right track but recognise that while one pipe is filling (positive) the pool the other is emptying (negative) the pool. So if you modify your equation to show that, you'll come out ok.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2F3+-+x%2F9+=+1 ALIGN=MIDDLE  ALT=\"x%2F3+-+x%2F9+=+1\"   DISABLED_style= \"max-width:90%; height:auto;\" > Simplify.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3x%2F9+-+x%2F9+=+1 ALIGN=MIDDLE  ALT=\"3x%2F9+-+x%2F9+=+1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%2F9+=+1 ALIGN=MIDDLE  ALT=\"2x%2F9+=+1\"   DISABLED_style= \"max-width:90%; height:auto;\" > Multiply both sides by 9.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x+=+9 ALIGN=MIDDLE  ALT=\"2x+=+9\"   DISABLED_style= \"max-width:90%; height:auto;\" > Finally, divide both sides by 2.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+4.5 ALIGN=MIDDLE  ALT=\"x+=+4.5\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Answer is: 4.5 hours.\r<BR>\n" );
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