document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=58613>Question 58613</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0072934662/algebrahomeworkh>Elementary Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Hope someone can help quick - I have a test on Monday and am having terrible difficulty with the story probs.<BR>\n" );
document.write( "Here's one problem:  \"Plane took 1 hr. LONGER to fly 480 AGAINST the wind than it took to fly the same distance WITH the wind.  If wind speed is 20 mph, what is the speed of plane in calm air?\"  I don't know how to figure speed of plane just based on air speed.  All I know is distance is 480 both ways and time taken is \"x + 1\" for against wind and \"x\" for with wind.  Can you help?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #40153 by </B><A HREF=/tutors/aboutme.mpl?userid=Paul><B>Paul(988)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Paul><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=40153\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> EQUATION:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=480%2F%28x-20%29-480%2F%28x%2B20%29=1 ALIGN=MIDDLE  ALT=\"480%2F%28x-20%29-480%2F%28x%2B20%29=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "480((x+20)-(x-20))=(x-20)(x+20)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=480%2840%29=x%5E2-400 ALIGN=MIDDLE  ALT=\"480%2840%29=x%5E2-400\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=19200%2B400=x%5E2 ALIGN=MIDDLE  ALT=\"19200%2B400=x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x=140<BR>\n" );
document.write( "Hence, the speed of the plane is 140mph.<BR>\n" );
document.write( "Paul. </SPAN>\n" );
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