document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=724220>Question 724220</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane took 4 hours to fly 600 miles against head wind. The return trip with same wind took one hour. find speed of plane in still air. I have tried d=rt , it didnt work and mutiple formulas and can't figure it out. I would appreciate the help. Thank you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #443644 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley79><B>checkley79(3341)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley79><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=443644\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D=RT<BR>\n" );
document.write( "600=(R-W)4 AGAINST THE WIND.<BR>\n" );
document.write( "600=4R-4W<BR>\n" );
document.write( "600=(R+W)1 WITH THE WIND.<BR>\n" );
document.write( "600=R+W<BR>\n" );
document.write( "R=600-W SUBSTITUTE (600-W) FOR R IN THE FIRST EQUATION & SOLVE FOR W.<BR>\n" );
document.write( "600=(600-W-W)4<BR>\n" );
document.write( "600=(600-2W)4<BR>\n" );
document.write( "600=2400-8W<BR>\n" );
document.write( "8W=2400-600<BR>\n" );
document.write( "8W=1800<BR>\n" );
document.write( "W=1800/8<BR>\n" );
document.write( "W=225 MPH. FOR THE WIND.<BR>\n" );
document.write( "R=600-225<BR>\n" );
document.write( "R=375 FOR THE RATRWE OF THE PLANE INSTILL AIR.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "600=(375-225)4<BR>\n" );
document.write( "600=150*4<BR>\n" );
document.write( "600=600<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );