document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=58738>Question 58738</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A six-passenger plane cruises at 180 mph in calm air. If the plane flies 7 miles with the wind in the same amount of time as it flies 5 miles against the wind, then what is the speed of the wind? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #40281 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=40281\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 180/(x+5)=5<BR>\n" );
document.write( "180/(x-5)=7<BR>\n" );
document.write( "180/(x+5)+2=180/(x-5)<BR>\n" );
document.write( "(180+2X+10)/(x+5)=180/(X-5)<BR>\n" );
document.write( "(190+2X)/(X+5)=180/(X-5)<BR>\n" );
document.write( "180(X+5)=(190+2X)(X-5)<BR>\n" );
document.write( "180X+900=190X+2X^2-950-10X<BR>\n" );
document.write( "2X^2+190X-10X-180X-950-900=0<BR>\n" );
document.write( "2X^2-1850=0<BR>\n" );
document.write( "X^2-925=0<BR>\n" );
document.write( "(X-30.41)(X+30.41)=0<BR>\n" );
document.write( "X-30.41=0<BR>\n" );
document.write( "X=30.41 MPH FOR THE WIND.<BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( "180/(30.42+5)=5<BR>\n" );
document.write( "180/35.41=5<BR>\n" );
document.write( "5=5<BR>\n" );
document.write( "180/(30.41-5)=7<BR>\n" );
document.write( "180/25.41=7<BR>\n" );
document.write( "7=7\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );