document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=32610>Question 32610</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane flew for 4 hours with a 20 km/h tail wind. The return flight against the same wind took 5 hours. Find the speed 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 #19107 by </B><A HREF=/tutors/aboutme.mpl?userid=Paul><B>Paul(988)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Paul><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=19107\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> lET THE SPEED OF THE PLANE BE X<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "4(x+20)=5(x-20)<BR>\n" );
document.write( "4x+80=5x-100<BR>\n" );
document.write( "-x=-180<BR>\n" );
document.write( "x=180<BR>\n" );
document.write( "Hence, the speed of the plane is 180mph.<BR>\n" );
document.write( "Paul. </SPAN>\n" );
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