document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=936365>Question 936365</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A plane travels 675 miles downwind in 3 hours. It turns around and comes back upwind but only travels 525 miles in the same amount of time. how strong is 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 #569805 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><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=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=569805\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = speed of airplane in still air<BR>\n" );
document.write( "y = speed of wind<BR>\n" );
document.write( "---<BR>\n" );
document.write( "s = d/t<BR>\n" );
document.write( "---<BR>\n" );
document.write( "downwind:<BR>\n" );
document.write( "x + y = 675/3<BR>\n" );
document.write( "x + y = 225<BR>\n" );
document.write( "---<BR>\n" );
document.write( "upwind:<BR>\n" );
document.write( "x - y = 525/3<BR>\n" );
document.write( "x - y = 175<BR>\n" );
document.write( "---<BR>\n" );
document.write( "put the system of linear equations into standard form<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x + y = 225<BR>\n" );
document.write( "x - y = 175<BR>\n" );
document.write( "---<BR>\n" );
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document.write( "---<BR>\n" );
document.write( "solution:<BR>\n" );
document.write( "x = speed of airplane in still air = 200 mph<BR>\n" );
document.write( "y = speed of wind = 25 mph<BR>\n" );
document.write( "---<BR>\n" );
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document.write( "--- </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );