document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=921813>Question 921813</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help setting up and answering this problem:<BR>\n" );
document.write( "The speed of the current in a river is 2mph. John rows 13 miles upstream and the same 13 miles back downstream. If the trip downstream took 2 hours less than the trip upstream, what was John's rowing speed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #559234 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=559234\">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=+s+ ALIGN=MIDDLE  ALT=\"+s+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the speed rowing in still water in mi/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+-+2+ ALIGN=MIDDLE  ALT=\"+s+-+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = his speed rowing upstream in mi/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+%2B+2+ ALIGN=MIDDLE  ALT=\"+s+%2B+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = his speed rowing downstream in mi/hr<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;\" > = time in hrs to row upstream<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+-+2+ ALIGN=MIDDLE  ALT=\"+t+-+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = time in hrs to row downstream<BR>\n" );
document.write( "---------------------------------------<BR>\n" );
document.write( "Equation for rowing upstream:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13+=+%28+s-2+%29%2At+ ALIGN=MIDDLE  ALT=\"+13+=+%28+s-2+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Equation for rowing downstream:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13+=+%28+s%2B2+%29%2A%28+t-2+%29+ ALIGN=MIDDLE  ALT=\"+13+=+%28+s%2B2+%29%2A%28+t-2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13+=+t%2A%28+s%2B2+%29+-+2s+-+4+ ALIGN=MIDDLE  ALT=\"+13+=+t%2A%28+s%2B2+%29+-+2s+-+4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+13+%2F+%28+s-2+%29+ ALIGN=MIDDLE  ALT=\"+t+=+13+%2F+%28+s-2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Substitute (1) into (2)<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+17+=+%28+13%2F%28+s-2%29+%29%2A%28+s%2B2+%29+-+2s++ ALIGN=MIDDLE  ALT=\"+17+=+%28+13%2F%28+s-2%29+%29%2A%28+s%2B2+%29+-+2s++\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+17%2A%28+s-2+%29+=+13%2A%28+s%2B2+%29+-+2s%2A%28+s-2+%29+ ALIGN=MIDDLE  ALT=\"+17%2A%28+s-2+%29+=+13%2A%28+s%2B2+%29+-+2s%2A%28+s-2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+17s+-+34+=+13s+%2B+26+-+2s%5E2+%2B+4s+ ALIGN=MIDDLE  ALT=\"+17s+-+34+=+13s+%2B+26+-+2s%5E2+%2B+4s+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2s%5E2+%2B+17s+-+13s+-+4s+=+34+%2B+26+ ALIGN=MIDDLE  ALT=\"+2s%5E2+%2B+17s+-+13s+-+4s+=+34+%2B+26+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2s%5E2+=+60+ ALIGN=MIDDLE  ALT=\"+2s%5E2+=+60+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s%5E2+=+30+ ALIGN=MIDDLE  ALT=\"+s%5E2+=+30+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+5.477+ ALIGN=MIDDLE  ALT=\"+s+=+5.477+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "John's rowing speed is 5.477 mi/hr<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13+=+%28+s-2+%29%2At+ ALIGN=MIDDLE  ALT=\"+13+=+%28+s-2+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13+=+%28+5.477-2+%29%2At+ ALIGN=MIDDLE  ALT=\"+13+=+%28+5.477-2+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13+=+3.477t+ ALIGN=MIDDLE  ALT=\"+13+=+3.477t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+3.739+ ALIGN=MIDDLE  ALT=\"+t+=+3.739+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13+=+%28+s%2B2+%29%2A%28+t-2+%29+ ALIGN=MIDDLE  ALT=\"+13+=+%28+s%2B2+%29%2A%28+t-2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13+=+%28+5.477%2B2+%29%2A%28+3.739-2+%29+ ALIGN=MIDDLE  ALT=\"+13+=+%28+5.477%2B2+%29%2A%28+3.739-2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13+=+7.477%2A1.739+ ALIGN=MIDDLE  ALT=\"+13+=+7.477%2A1.739+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13+=+13.003+ ALIGN=MIDDLE  ALT=\"+13+=+13.003+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Error due to rounding off, I think<BR>\n" );
document.write( "Check all my math\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " <BR>\n" );
document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );