document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=561639>Question 561639</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane flies 440 miles with the wind and 340 against the wind in the same length of time. If the speed of the wind is 20, what is the speed of the airplane in still air? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #364325 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=364325\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> plane speed		x	mph				<BR>\n" );
document.write( "wind speed		20	mph				<BR>\n" );
document.write( "..							<BR>\n" );
document.write( "against wind   		x	-	20	mph		<BR>\n" );
document.write( "with wind  		x   	+	20	mph		<BR>\n" );
document.write( "							<BR>\n" );
document.write( "Distance against 	wind	340					<BR>\n" );
document.write( "Distance with 	wind	440					<BR>\n" );
document.write( "Time = same							<BR>\n" );
document.write( "340	/(x-	20	)=	440	/(x+	20	)<BR>\n" );
document.write( "340	*(x+	20	)=	440	*(x-	20	)<BR>\n" );
document.write( "340	x  	+	6800	=	440	x	-8800<BR>\n" );
document.write( "440	x  	-340	x   	=	8800	+	6800<BR>\n" );
document.write( "100	x  	=	15600				<BR>\n" );
document.write( "/	100						<BR>\n" );
document.write( "	x=	156	mph	\r<BR>\n" );
document.write( "\n" );
document.write( "speed in still air = 156 mph			<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );