document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=300386>Question 300386</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an airplace travels 1800 miles against the wind for 6 hours. The return trip takes 5 hours. Find the speed of the airplane in still air and the speed of the wind. \r<BR>\n" );
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document.write( "I know the answer is 30 mph wind speed, and 330 cruising speed. I can figure it out in my head, I just do not know the proper equation to plug the numbers into.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #215562 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=215562\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'm not sure how you figure it out in your head without an equation???<BR>\n" );
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document.write( "Let the plane speed be S and the wind speed be W.<BR>\n" );
document.write( "Remember rate multipled by time equals distance.<BR>\n" );
document.write( "Against the wind,<BR>\n" );
document.write( "1.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28S-W%296=1800 ALIGN=MIDDLE  ALT=\"%28S-W%296=1800\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28S%2BW%295=1800 ALIGN=MIDDLE  ALT=\"%28S%2BW%295=1800\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "You can simplify each equation.<BR>\n" );
document.write( "1.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S-W=300 ALIGN=MIDDLE  ALT=\"S-W=300\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%2BW=360 ALIGN=MIDDLE  ALT=\"S%2BW=360\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Add the two equations together to get rid of W.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2S=660 ALIGN=MIDDLE  ALT=\"2S=660\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28+S=330%29 ALIGN=MIDDLE  ALT=\"highlight_green%28+S=330%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Then from eq. 2,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=330%2BW=360 ALIGN=MIDDLE  ALT=\"330%2BW=360\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28+W=30%29 ALIGN=MIDDLE  ALT=\"highlight_green%28+W=30%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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