document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=27689>Question 27689</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A jetliner flying with the wind traveled 3600 km in 6 hours.   The return trip, against the wind, took 8 hours.   Find the rate at which the jet flew in still air.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15083 by </B><A HREF=/tutors/aboutme.mpl?userid=Paul><B>Paul(988)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Paul><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=15083\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the speed of the plane be x<BR>\n" );
document.write( "Let the speed of the wind be y\r<BR>\n" );
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document.write( "6(x+y)=3600 (solve for y)<BR>\n" );
document.write( "6x+6y=3600<BR>\n" );
document.write( "6y=3600-6x<BR>\n" );
document.write( "y=600-x (subsitution)\r<BR>\n" );
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document.write( "8(x-y)=3600<BR>\n" );
document.write( "8x-8y=3600 (apply subsitution)<BR>\n" );
document.write( "8x-8(600-x)=3600<BR>\n" );
document.write( "8x+8x-4800=3600<BR>\n" );
document.write( "16x=8400<BR>\n" );
document.write( "x=525\r<BR>\n" );
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document.write( "y=600-525<BR>\n" );
document.write( "y=75\r<BR>\n" );
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document.write( "Hence, the speed of the plane in still air is 525mph and the speed of the wind is 75mph.<BR>\n" );
document.write( "PAUL. </SPAN>\n" );
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