document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=976564>Question 976564</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Peter paddled a canoe 20 miles upstream, then paddled the canoe back to the starting point.  the rate of the current was 3 mph and the total trip took 7 hours.  At what rate would Peter paddle the canoe in still water?\r<BR>\n" );
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document.write( "Please help solve.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #598135 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=598135\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Peter paddled a canoe 20 miles upstream, then paddled the canoe back to the starting point. the rate of the current was 3 mph and the total trip took 7 hours. At what rate would Peter paddle the canoe in still water? <BR>\n" );
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document.write( "let x=rate in still water<BR>\n" );
document.write( "x+3=rate of canoe downtream<BR>\n" );
document.write( "x-3=rate of canoe uptream<BR>\n" );
document.write( "travel time=distance/rate<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=20%2F%28x%2B3%29%2B20%2F%28x-3%29=7 ALIGN=MIDDLE  ALT=\"20%2F%28x%2B3%29%2B20%2F%28x-3%29=7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "lcd: (x+3)(x-3)<BR>\n" );
document.write( "20(x-3)+20(x+3)=7(x+3)(x-3)<BR>\n" );
document.write( "20x-60+20x+60=7(x^2-9)<BR>\n" );
document.write( "40x=7x^2-63<BR>\n" );
document.write( "7x^2-40x-63=0<BR>\n" );
document.write( "(x-7)(7x+9)=0<BR>\n" );
document.write( "x=-9/7(reject)<BR>\n" );
document.write( "x=7<BR>\n" );
document.write( "At what rate would Peter paddle the canoe in still water?  7 mph </SPAN>\n" );
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