document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1069790>Question 1069790</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A plane flies 435 miles with the wind and 375 miles against the wind in the same length of time. If the speed of the wind is 10 &#8203;mph, 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 #684915 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=684915\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> in x time, the plane flies 435 miles, so speed is 435/x; that speed is p+10<BR>\n" );
document.write( "in x time, the plane flies 375 miles, so speed is 375/x;that speed is p-10<BR>\n" );
document.write( "p-10=375/x<BR>\n" );
document.write( "x=375/p-10<BR>\n" );
document.write( "x also = 435/p+10<BR>\n" );
document.write( "set those two equal to each other and cross-multiply<BR>\n" );
document.write( "375(p+10)=435 (p-10)<BR>\n" );
document.write( "375p +3750=435p-4350<BR>\n" );
document.write( "60p=8100<BR>\n" );
document.write( "p=135 mph. ANSWER<BR>\n" );
document.write( "With the wind, the plane flies at 145 mph and covers 435 miles in 3 hours.<BR>\n" );
document.write( "Against the wind, the plane flies at 125 mph and covers 375 miles in 3 hours.  <BR>\n" );
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