document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=423288>Question 423288</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane flew for 3 hours with a tail wind of 18 kilometers per hour. The return flight against the wind took 4 hours. Find the rate of the plane 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 #295280 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=295280\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> plane speed =x	mph									<BR>\n" );
document.write( "wind speed 18	mph						<BR>\n" );
document.write( "time with tail wind 3 hours									<BR>\n" );
document.write( "time against wind 4 hours									<BR>\n" );
document.write( "Distance = same											<BR>\n" );
document.write( "8(x+18)	=4(x-18)<BR>\n" );
document.write( "8x +144	=4x-72					<BR>\n" );
document.write( "4x-8x=144-72					<BR>\n" );
document.write( "x =216 mph	plane speed							<BR>\n" );
document.write( "											<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );