document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1053975>Question 1053975</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello there,<BR>\n" );
document.write( "Here is my problem: A tank can be filled by one pump in 50 minutes and by another pump in 60 minutes. A third pump can drain the tank in 75 minutes. If all 3 pumps go into operation, how long will it take to fill the tank?\r<BR>\n" );
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document.write( "I made a table saying which pumps there are and how long it takes to fill the tank or drain. I keep getting an equation like so:\r<BR>\n" );
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document.write( "1/50x + 1/60x - 1/75x = 1\r<BR>\n" );
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document.write( "That simplifes to 7/300x = 1\r<BR>\n" );
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document.write( "Then x = 42.8571 repeated.\r<BR>\n" );
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document.write( "My Online Homework says this answer is wrong. Can you tell me what I am doing wrong?\r<BR>\n" );
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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 #669165 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=669165\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Add the rates of pumping and subtract the<BR>\n" );
document.write( "rate of draining ( as you know )<BR>\n" );
document.write( "[ 1 tank filled ] / [ 50 min ]<BR>\n" );
document.write( "[ 1 tank filled ] / [ 60 min ]<BR>\n" );
document.write( "[ 1 tank drained ] / [ 75 min ]<BR>\n" );
document.write( "-----------------------------------------<BR>\n" );
document.write( "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;\" > = the time in minutes to fill tank<BR>\n" );
document.write( "The rate filling the tank is:<BR>\n" );
document.write( "[ 1 tank filled ] / [  t minutes ]<BR>\n" );
document.write( "------------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F50+%2B+1%2F60+-+1%2F75+=+1%2Ft+ ALIGN=MIDDLE  ALT=\"+1%2F50+%2B+1%2F60+-+1%2F75+=+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=+300t+ ALIGN=MIDDLE  ALT=\"+300t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6t+%2B+5t+-+4t+=+300+ ALIGN=MIDDLE  ALT=\"+6t+%2B+5t+-+4t+=+300+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+7t+=+300+ ALIGN=MIDDLE  ALT=\"+7t+=+300+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+42.857+ ALIGN=MIDDLE  ALT=\"+t+=+42.857+\"   DISABLED_style= \"max-width:90%; height:auto;\" > min<BR>\n" );
document.write( "Same as your answer -I would start to doubt the <BR>\n" );
document.write( "online homework. You might want another opinion also. </SPAN>\n" );
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