document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1004729>Question 1004729</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with this word problem! I've been trying it for about 30 minutes and can't seem to figure it out. \r<BR>\n" );
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document.write( "A boat went 8 kilometers upstream and returned all in two hours. If the current was running at 3 km/hr, what is the boat's speed in still water. \r<BR>\n" );
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document.write( "Thank you so much!  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #621102 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52797)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=621102\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "A boat went 8 kilometers upstream and returned all in two hours. If the current was running at 3 km/hr, what is the boat's speed in still water. <BR>\n" );
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document.write( "Let u be the boat's speed in still water in &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=km%2Fh ALIGN=MIDDLE  ALT=\"km%2Fh\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Then the boat's speed relative to the river's bank is &nbsp;(u-3) &nbsp;upstream and &nbsp;(u+3) &nbsp;downstream.\r<BR>\n" );
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document.write( "The time the boat spent for the upstream trip is &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%2F%28u-3%29 ALIGN=MIDDLE  ALT=\"8%2F%28u-3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > hours.\r<BR>\n" );
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document.write( "The time the boat spent for the downstream trip is &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%2F%28u%2B3%29 ALIGN=MIDDLE  ALT=\"8%2F%28u%2B3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > hours.\r<BR>\n" );
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document.write( "So, you have an equation for the duration of the close loop trip:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%2F%28u-3%29 ALIGN=MIDDLE  ALT=\"8%2F%28u-3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%2F%28u%2B3%29 ALIGN=MIDDLE  ALT=\"8%2F%28u%2B3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 2.\r<BR>\n" );
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document.write( "Solve it. &nbsp;The first step is to multiply both sides by &nbsp;(u-3)*(u+3).\r<BR>\n" );
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document.write( "<U>Answer</U>. &nbsp;9 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=km%2Fh ALIGN=MIDDLE  ALT=\"km%2Fh\"   DISABLED_style= \"max-width:90%; height:auto;\" >. \r<BR>\n" );
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