document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=828808>Question 828808</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane flew for 4 hours with a 20 km/h tail wind. The return flight against the same wind took 5 hours. 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 #499557 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=499557\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ___________________speed_________time____________distance<BR>\n" );
document.write( "WITHWIND___________r+20__________4_______________<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28r%2B20%29%2A4=d ALIGN=MIDDLE  ALT=\"%28r%2B20%29%2A4=d\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "AGAINSTWIND________r-20__________5_______________<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28r-20%29%2A5=d ALIGN=MIDDLE  ALT=\"%28r-20%29%2A5=d\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Can you figure what to do with what?<BR>\n" );
document.write( "What appears as two equations with two unknowns can be transformed into ONE equation with ONE unknown. </SPAN>\n" );
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