document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=207033>Question 207033</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A plane flies 500 miles with the wind and 350 miles against the wind in the same length of time. If the speed of the wind is 30 mph, what is 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 #159973 by </B><A HREF=/tutors/aboutme.mpl?userid=HyperBrain><B>HyperBrain(694)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=HyperBrain><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=159973\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x=the speed of the plane in still air<BR>\n" );
document.write( "Then x+30=speed of the plane with the wind<BR>\n" );
document.write( "x-30=speed of the plane against the wind<BR>\n" );
document.write( "---<BR>\n" );
document.write( "(1)x+30=500<BR>\n" );
document.write( "(2)x-30=350<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Adding the two equations,<BR>\n" );
document.write( "2x=850<BR>\n" );
document.write( "x=<u>425 mph</u> </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );