document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=910643>Question 910643</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A tank can be filled by a certain pipe in 18 hours. Five hours after this pipe is opened, it is supplemented by a smaller pipe which, by itself, could fill the tank in 24 hours. Find the total time, measured from the opening of the larger pipe, to fill the tank. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #552590 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=552590\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Main objective first, is to derive an equation which represents the situation.  The final objective is to solve the equation.\r<BR>\n" );
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document.write( "RATES AS TANK per HOUR<BR>\n" );
document.write( "Certain Pipe, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F18 ALIGN=MIDDLE  ALT=\"1%2F18\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Smaller Pipe, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F24 ALIGN=MIDDLE  ALT=\"1%2F24\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Certain Plus Smaller, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F18%2B1%2F24 ALIGN=MIDDLE  ALT=\"1%2F18%2B1%2F24\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Simplify the combined pipes rate.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F18%2B1%2F24 ALIGN=MIDDLE  ALT=\"1%2F18%2B1%2F24\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F%283%2A2%2A3%29%2B1%2F%282%2A2%2A2%2A3%29 ALIGN=MIDDLE  ALT=\"1%2F%283%2A2%2A3%29%2B1%2F%282%2A2%2A2%2A3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >,  LCD is 2*2*2*3*3=72<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F18%29%284%2F4%29%2B%281%2F24%29%283%2F3%29 ALIGN=MIDDLE  ALT=\"%281%2F18%29%284%2F4%29%2B%281%2F24%29%283%2F3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2F72%2B3%2F72 ALIGN=MIDDLE  ALT=\"4%2F72%2B3%2F72\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%287%2F72%29 ALIGN=MIDDLE  ALT=\"highlight_green%287%2F72%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >-----the pipes combined rate working together\r<BR>\n" );
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document.write( "The situation:<BR>\n" );
document.write( "Certain pipe operates for 5 hours, and then the smaller  pipe is also opened; and for an unknown amount of additional time, the tank is full.  Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t ALIGN=MIDDLE  ALT=\"t\"   DISABLED_style= \"max-width:90%; height:auto;\" > be this additional time, which later we want to ADD to 5.\r<BR>\n" );
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document.write( "EQUATION:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28%281%2F18%29%2A5%2B%287%2F72%29%2At=1%29 ALIGN=MIDDLE  ALT=\"highlight%28%281%2F18%29%2A5%2B%287%2F72%29%2At=1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "Solve for t, and add to find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28t%2B5%29 ALIGN=MIDDLE  ALT=\"highlight%28t%2B5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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