document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=758715>Question 758715</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A plane flies 465 miles with the wind and 345 miles against the wind in the same length of time. If the speed of the wind is 20mph, find the speed of the plane in still air. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #461669 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=461669\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A plane flies 465 miles with the wind and 345 miles against the wind in the same length of time. If the speed of the wind is 20mph, find the speed of the plane in still air.<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+20=speed of plane with the wind<BR>\n" );
document.write( "x-20=speed of plane against the wind<BR>\n" );
document.write( "travel time=distance/speed<BR>\n" );
document.write( "..<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=465%2F%28x%2B20%29=345%2F%28x-20%29 ALIGN=MIDDLE  ALT=\"465%2F%28x%2B20%29=345%2F%28x-20%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "465(x-20)=345(x+20)<BR>\n" );
document.write( "465x-9300=345x+6900<BR>\n" );
document.write( "120x=16200<BR>\n" );
document.write( "x=135<BR>\n" );
document.write( "speed of the plane in still air=135 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );