document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=761466>Question 761466</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It takes a rowing crew 1 hour and 30 minutes longer to go 12 miles up a river than to return.  Find the speed of the rowing crew in still water if the speed of the current is 2 mph.<BR>\n" );
document.write( "I set the problem up ( s= speed and t= time)<BR>\n" );
document.write( "Going up river:  12= (s+ 2)t<BR>\n" );
document.write( "I then know that t= 12/(s+2)<BR>\n" );
document.write( "Going down river: 12= (s-2)(t+1.5)\r<BR>\n" );
document.write( "\n" );
document.write( "So making the substitution for t:\r<BR>\n" );
document.write( "\n" );
document.write( "Going down river 12=(s-2)((12/(s+2)) + 1.5)\r<BR>\n" );
document.write( "\n" );
document.write( "But this is where I run into problems.  How do I solve this algebra problem?\r<BR>\n" );
document.write( "\n" );
document.write( "Thanks\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #463239 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</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=463239\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let r = speed in still water.  You do not know time but you can create expressions for both directions each.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "WAY___________rate_____________time____________distance<BR>\n" );
document.write( "Up____________r-2______________12/(r-2)_________12<BR>\n" );
document.write( "Down__________r+2______________12/(r+2)_________12\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Upstream was 3/2 hour MORE than downstream:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%2812%2F%28r-2%29=12%2F%28r%2B2%29%2B3%2F2%29 ALIGN=MIDDLE  ALT=\"highlight%2812%2F%28r-2%29=12%2F%28r%2B2%29%2B3%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Multiply left and right by the LCD, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%28r-2%29%28r%2B2%29 ALIGN=MIDDLE  ALT=\"2%28r-2%29%28r%2B2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and simplifying,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=24%28r%2B2%29=24%28r-2%29%2B3%28r%5E2-4%29 ALIGN=MIDDLE  ALT=\"24%28r%2B2%29=24%28r-2%29%2B3%28r%5E2-4%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=48=-48%2B3r%5E2-12 ALIGN=MIDDLE  ALT=\"48=-48%2B3r%5E2-12\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=96%2B12=3r%5E2 ALIGN=MIDDLE  ALT=\"96%2B12=3r%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3r%5E2=108 ALIGN=MIDDLE  ALT=\"3r%5E2=108\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5E2=36 ALIGN=MIDDLE  ALT=\"r%5E2=36\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28r=6%29 ALIGN=MIDDLE  ALT=\"highlight%28r=6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );