document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=437587>Question 437587</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a plane flys 420 miles with the wind and 350 miles against the wind at the same length of time with a wind speed of 20 miles per hour what is the speed of the plane </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #302714 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=302714\">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		350					<BR>\n" );
document.write( "Distance with tail wind		420					<BR>\n" );
document.write( "Time = same							<BR>\n" );
document.write( "350/(x-	20)=420/(x+20)<BR>\n" );
document.write( "350*(x+20)=420*(x-20)<BR>\n" );
document.write( "350x+7000=420x	-8400<BR>\n" );
document.write( "420x-350x=8400+	7000<BR>\n" );
document.write( "70x=15400				<BR>\n" );
document.write( "/70						<BR>\n" );
document.write( "x=	220	mph				<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );