document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=908822>Question 908822</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A helicopter flies 264 miles against the wind in 2 hours; with the wind, it can fly 396 miles in the same amount of time. Find the speed of the helicopter 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 #551622 by </B><A HREF=/tutors/aboutme.mpl?userid=KlambinRonsentaswer><B>KlambinRonsentaswer(36)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KlambinRonsentaswer><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=KlambinRonsentaswer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=551622\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'm glad to help you.  I am a Chinese student and I think there's something different between our classes. :) \r<BR>\n" );
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document.write( "let the speed of the helicopter in still air = x<BR>\n" );
document.write( "let the wind speed = y<BR>\n" );
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document.write( "then you can get a linear equation of two unknowns.\r<BR>\n" );
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document.write( "2·(x-y)=264  [upwind flight distance ]<BR>\n" );
document.write( "2·(x+y)=396  [downwind flight distance]\r<BR>\n" );
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document.write( "then solve it.\r<BR>\n" );
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document.write( "Okay. </SPAN>\n" );
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