document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=442497>Question 442497</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two planes make an 800 mile flight, one flying 100 miles per hour faster than the other.  The quicker plane makes the trip 4 hours faster.  How long did it take the slower plane to complete the flight? \r<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 #305226 by </B><A HREF=/tutors/aboutme.mpl?userid=jorel1380><B>jorel1380(3719)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jorel1380><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=jorel1380><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=305226\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 800/x=800/(x+100)+4<BR>\n" );
document.write( "800(x+100)=800x+4x2+400x<BR>\n" );
document.write( "800x+80000=4x2+1200x<BR>\n" );
document.write( "0=4x2+400x-80000<BR>\n" );
document.write( "0=x2+100x-20000<BR>\n" );
document.write( "0=(x+200)(x-100)<BR>\n" );
document.write( "x=100 or -200.   Throwing out the negative answer, we get the slow plane flying at 100mph, the fast plane moving at 200mph.. </SPAN>\n" );
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