document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=360260>Question 360260</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I can't remember how to do these? I know it's rate times time = distance, but I come up with 54mph, is this right?\r<BR>\n" );
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document.write( "A twin-engined aircraft can fly 648 miles from city A to B in 3 hours with the wind and make the return trip in 6 hours against the wind. 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 #257076 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=257076\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let p = speed of the wind in still air, w = speed of the wind.\r<BR>\n" );
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document.write( "Then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=matrix%282%2C1%2C+3%28p%2Bw%29+=+648%2C6%28p-w%29+=+648%29 ALIGN=MIDDLE  ALT=\"matrix%282%2C1%2C+3%28p%2Bw%29+=+648%2C6%28p-w%29+=+648%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=matrix%282%2C1%2C+p%2Bw+=+216%2Cp-w+=+108%29 ALIGN=MIDDLE  ALT=\"matrix%282%2C1%2C+p%2Bw+=+216%2Cp-w+=+108%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > after dividing by 3 and 6, respectively,<BR>\n" );
document.write( "Adding corresponding sides of the equations, we get<BR>\n" );
document.write( "2p = 324,<BR>\n" );
document.write( "p = 162, and w = 216-162 = 54.<BR>\n" );
document.write( "The plane goes 162 mph, the wind 54 mph.<BR>\n" );
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