document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1135838>Question 1135838</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A new type of pump can drain a certain pool in 4<BR>\n" );
document.write( " hours. An older pump can drain the pool in <BR>\n" );
document.write( "6 hours. How long will it take both pumps working together to drain the pool? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #753520 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=753520\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Add their rates of pumping<BR>\n" );
document.write( "Newer pump:<BR>\n" );
document.write( "[ 1 pool drained ] / [ 4 hrs ]<BR>\n" );
document.write( "Older pump:<BR>\n" );
document.write( "[ 1 pool drained ] / [ 6 hrs ]<BR>\n" );
document.write( "Working together:<BR>\n" );
document.write( "[ 1 pool drained ] / [ t hrs ]<BR>\n" );
document.write( "-----------------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F4+%2B+1%2F6+=+1%2Ft+ ALIGN=MIDDLE  ALT=\"+1%2F4+%2B+1%2F6+=+1%2Ft+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+12t+ ALIGN=MIDDLE  ALT=\"+12t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3t+%2B+2t+=+12+ ALIGN=MIDDLE  ALT=\"+3t+%2B+2t+=+12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5t+=+12+ ALIGN=MIDDLE  ALT=\"+5t+=+12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+2.4+ ALIGN=MIDDLE  ALT=\"+t+=+2.4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2 hrs and 24 min<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );