document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=428525>Question 428525</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane can travewl 380 miles into the wind in the same time that it can travel 420 miles with the wind.  If the wind speed is 10 miles per hour, find the speed of the airplane without any wind. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #297825 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=297825\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> plane speed		x	mph				<BR>\n" );
document.write( "wind speed		10	mph				<BR>\n" );
document.write( "..							<BR>\n" );
document.write( "against wind x-10mph		<BR>\n" );
document.write( "with wind  x+10	mph		<BR>\n" );
document.write( "							<BR>\n" );
document.write( "Distance against wind	380					<BR>\n" );
document.write( "Distance with tail wind	420					<BR>\n" );
document.write( "Time = same							<BR>\n" );
document.write( "380/(x-	10)=	420/(x+	10)<BR>\n" );
document.write( "380*(x+	10)=	420*(x-	10)<BR>\n" );
document.write( "380x  	+3800	=420x-4200<BR>\n" );
document.write( "420x  	-380x   	=4200+3800<BR>\n" );
document.write( "40x  	=8000				<BR>\n" );
document.write( "/40						<BR>\n" );
document.write( "x=	200 mph				<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );