document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=667752>Question 667752</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat can move at 8 miles/hour in still water. If it can travel 20 miles downstream in the same time, it can travel 12 miles upstream. Determine the rate of the stream. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #415148 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=415148\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Boat speed	=	8	mi/h										<BR>\n" );
document.write( "current speed	=	x	mi/h										<BR>\n" );
document.write( "				x									<BR>\n" );
document.write( "speed against	wind	8	-	x									<BR>\n" );
document.write( "speed with	wind	8	+x										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "Distance against	wind	12	miles										<BR>\n" );
document.write( "Distance with	wind	20	miles										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "t=d/r	time against = time with		wind	-									<BR>\n" );
document.write( "12/(8-x	)=20/(8+x)<BR>\n" );
document.write( "12(8+x)=20(8-x)			<BR>\n" );
document.write( "96+12x	=160-20	x					<BR>\n" );
document.write( "20x+12x=	160		-96						<BR>\n" );
document.write( "32	x	=	64										\r<BR>\n" );
document.write( "\n" );
document.write( "/	32			<BR>\n" );
document.write( "x	=	2	mi/h										\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );