document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=965111>Question 965111</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a twin engined aircraft can fly 816 miles from one city to another in 3 hours with the wind and make the return trip in 8 hours against the wind.what was 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 #589881 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=589881\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a twin engined aircraft can fly 816 miles from one city to another in 3 hours with the wind and make the return trip in 8 hours against the wind.what was the speed of the wind?<BR>\n" );
document.write( "***<BR>\n" );
document.write( "let x=speed of plane in still air<BR>\n" );
document.write( "let c=speed of wind<BR>\n" );
document.write( "x+c=speed of plane with the wind<BR>\n" );
document.write( "x-c=speed of plane against the wind<BR>\n" );
document.write( "travel time*speed=distance<BR>\n" );
document.write( "..<BR>\n" );
document.write( "3(x+c)=816<BR>\n" );
document.write( "8(x-c)=816<BR>\n" );
document.write( "..<BR>\n" );
document.write( "3x+3c=816<BR>\n" );
document.write( "8x-8c=816<BR>\n" );
document.write( "..<BR>\n" );
document.write( "24x+24c=6528 (mult. eq. by 8)<BR>\n" );
document.write( "24x-24c=2448 (mult. eq. by 3)<BR>\n" );
document.write( "subtract:<BR>\n" );
document.write( "48c=4080<BR>\n" );
document.write( "c=85<BR>\n" );
document.write( "speed of wind=85 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );