document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=540651>Question 540651</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A certain aircraft can fly 1280 miles with the wind in 4 hours and travel the same distance against the wind in 8 hours. What is the speed of the wind?\r<BR>\n" );
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document.write( "Can you please show me step by step so i know how to do it? thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #353802 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=353802\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> r = d / t\r<BR>\n" );
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document.write( "a + w = 1280 / 4 ___ a + w = 320\r<BR>\n" );
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document.write( "a - w = 1280 / 8 ___ a - w = 160\r<BR>\n" );
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document.write( "adding the equations eliminates w ___ 2a = 480 ___ a = 240\r<BR>\n" );
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document.write( "substituting ___ (240) + w = 320 ___ w = 80 </SPAN>\n" );
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