document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1155509>Question 1155509</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A and b  can paint a wall in 2 hours<BR>\n" );
document.write( "A and C  can paint the wall in 3 hours<BR>\n" );
document.write( "B and C can paint the wall in 4 hours<BR>\n" );
document.write( "How long will it take to paint the wall if all 3 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 #778110 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=778110\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A and B  can paint a wall in 2 hours<BR>\n" );
document.write( "A and C  can paint the wall in 3 hours<BR>\n" );
document.write( "B and C can paint the wall in 4 hours<BR>\n" );
document.write( "How long will it take to paint the wall if all 3 work together <BR>\n" );
document.write( "=============<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FA+%2B+1%2FB++=+1%2F2 ALIGN=MIDDLE  ALT=\"1%2FA+%2B+1%2FB++=+1%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FA+%2B+1%2FC++=+1%2F3 ALIGN=MIDDLE  ALT=\"1%2FA+%2B+1%2FC++=+1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FB+%2B+1%2FC++=+1%2F4 ALIGN=MIDDLE  ALT=\"1%2FB+%2B+1%2FC++=+1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---<BR>\n" );
document.write( "Sub r, s & t for 1/A, 1/B & 1/C respectively.<BR>\n" );
document.write( "---<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+%2B+s++=+1%2F2 ALIGN=MIDDLE  ALT=\"r+%2B+s++=+1%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+%2B+t++=+1%2F3 ALIGN=MIDDLE  ALT=\"r+%2B+t++=+1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+%2B+t++=+1%2F4 ALIGN=MIDDLE  ALT=\"s+%2B+t++=+1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---<BR>\n" );
document.write( "s = 1/2 - r<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+%2B+t++=+1%2F4 ALIGN=MIDDLE  ALT=\"s+%2B+t++=+1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F2+-+r+%2B+t++=+1%2F4 ALIGN=MIDDLE  ALT=\"1%2F2+-+r+%2B+t++=+1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-r+%2B+t++=+-1%2F4 ALIGN=MIDDLE  ALT=\"-r+%2B+t++=+-1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+-+t++=+1%2F4 ALIGN=MIDDLE  ALT=\"r+-+t++=+1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+%2B+t++=+1%2F3 ALIGN=MIDDLE  ALT=\"r+%2B+t++=+1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Add<BR>\n" );
document.write( "2r = 7/12<BR>\n" );
document.write( "r = 7/24<BR>\n" );
document.write( "A = 24/7<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Solve for s & t, then B & C.<BR>\n" );
document.write( "Can you do the rest? </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );