document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=111172>Question 111172</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane maintaining a constant airspeed takes as long to go 450 mi with the wind as it does to go 375 mi against the wind. If the wind is blowing at 15 mph, what is 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 #81135 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=81135\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 450/(x+15)=375/x now cross multiply<BR>\n" );
document.write( "450x=375(x+15)<BR>\n" );
document.write( "450x-375x=5625<BR>\n" );
document.write( "75x=5625<BR>\n" );
document.write( "x=5625/75<BR>\n" );
document.write( "x=75 speed of the plane.<BR>\n" );
document.write( "proof<BR>\n" );
document.write( "450/(75+15)=375/75<BR>\n" );
document.write( "450/90=5<BR>\n" );
document.write( "5=5 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );