document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=674338>Question 674338</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A goes down river 9 miles, then back upriver for 3 miles.  Rate of river current is 6 mph.  How long does it take A to go the 12 miles?  I have 9/x-6 for time downstream, and 3/x-6 for time upstream, but don't know how to set up the equation.  (Answer is 1 hour.) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #419167 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=419167\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r+ ALIGN=MIDDLE  ALT=\"+r+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = A's rate in still water ( no current )<BR>\n" );
document.write( "Going downstream, his rate is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r+%2B+6+ ALIGN=MIDDLE  ALT=\"+r+%2B+6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Going upstream, his rate is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r+-+6+ ALIGN=MIDDLE  ALT=\"+r+-+6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Going downstream,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+9+=+%28+r+%2B+6+%29%2At%5B1%5D+ ALIGN=MIDDLE  ALT=\"+9+=+%28+r+%2B+6+%29%2At%5B1%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Going upstream,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3+=+%28+r+-+6+%29%2At%5B2%5D+ ALIGN=MIDDLE  ALT=\"+3+=+%28+r+-+6+%29%2At%5B2%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "You need to find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%5B1%5D+%2B+1%5B2%5D+ ALIGN=MIDDLE  ALT=\"+t%5B1%5D+%2B+1%5B2%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%5B1%5D+=+9+%2F+%28+r+%2B+6+%29+ ALIGN=MIDDLE  ALT=\"+t%5B1%5D+=+9+%2F+%28+r+%2B+6+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%5B2%5D+=+3+%2F+%28+r+-+6+%29+ ALIGN=MIDDLE  ALT=\"+t%5B2%5D+=+3+%2F+%28+r+-+6+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%5B1%5D+%2B+t%5B2%5D+=+9%2F%28+r+%2B+6+%29+%2B+3%2F%28+r+-+6+%29+ ALIGN=MIDDLE  ALT=\"+t%5B1%5D+%2B+t%5B2%5D+=+9%2F%28+r+%2B+6+%29+%2B+3%2F%28+r+-+6+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I think you're missing his rate in still water<BR>\n" );
document.write( "Can't solve without it.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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