document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=977590>Question 977590</A>: <I><SPAN STYLE=\"word-break: break-all;\"> John can clean a large tank at an aquarium in about 5 hours. When John and Laura work together, they can clean the tank in about 3 hours.\r<BR>\n" );
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document.write( "About how long would it take Laura to clean the tank if she works by herself? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #599142 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=599142\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> John's rate of cleaning:<BR>\n" );
document.write( "[ 1 tank ] / [ 5 hrs ]<BR>\n" );
document.write( "I will call Laura's rate of cleaning:<BR>\n" );
document.write( "[ 1 tank ] / [ t hrs ]<BR>\n" );
document.write( "Their rate of cleaning working together:<BR>\n" );
document.write( "[ 1 tank ] / [ 3 hrs ]<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "Add their rates of cleaning to get their<BR>\n" );
document.write( "rate working together:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F5+%2B+1%2Ft+=+1%2F3+ ALIGN=MIDDLE  ALT=\"+1%2F5+%2B+1%2Ft+=+1%2F3+\"   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=+15t+ ALIGN=MIDDLE  ALT=\"+15t+\"   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+15+=+5t+ ALIGN=MIDDLE  ALT=\"+3t+%2B+15+=+5t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2t+=+15+ ALIGN=MIDDLE  ALT=\"+2t+=+15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+7.5+ ALIGN=MIDDLE  ALT=\"+t+=+7.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Working by herself, Laura takes 7 hrs and 30 min<BR>\n" );
document.write( "to clean the tank<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F5+%2B+1%2Ft+=+1%2F3+ ALIGN=MIDDLE  ALT=\"+1%2F5+%2B+1%2Ft+=+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%2F5+%2B+1%2F7.5+=+1%2F3+ ALIGN=MIDDLE  ALT=\"+1%2F5+%2B+1%2F7.5+=+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%2F5+%2B+2%2F15+=+1%2F3+ ALIGN=MIDDLE  ALT=\"+1%2F5+%2B+2%2F15+=+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=+3%2F15+%2B+2%2F15+=+5%2F15+ ALIGN=MIDDLE  ALT=\"+3%2F15+%2B+2%2F15+=+5%2F15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5%2F15+=+5%2F15+ ALIGN=MIDDLE  ALT=\"+5%2F15+=+5%2F15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );