document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=122091>Question 122091</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A six-passenger plane cruises at 180 mph in calm air. If thr plane fies 7 miles with the wind in the same amount of time as it flies 5 miles against wind, then what is the wind speed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #89626 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=89626\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 7/(180+w)=5/(180-w)<BR>\n" );
document.write( "now cross multiply.<BR>\n" );
document.write( "5(180+w)=7(180-w)<BR>\n" );
document.write( "900+5w=1260-7w<BR>\n" );
document.write( "5w+7w=1260-900<BR>\n" );
document.write( "12w=360<BR>\n" );
document.write( "w=360/12<BR>\n" );
document.write( "w=30 answer for the speed of the wind.<BR>\n" );
document.write( "proof<BR>\n" );
document.write( "7/(180+30)=5/(180-30)<BR>\n" );
document.write( "7/210=5/150<BR>\n" );
document.write( ".033=.033 </SPAN>\n" );
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