document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=558130>Question 558130</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A passenger plane flew to moscow and back. The trip there took five hours and the trip back took nine hours.  It averaged 144 km/h faster on the trip there than on the return trip.  Find the passenger plane's average speed on the outbound trip.\r<BR>\n" );
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document.write( "O.k so I did have a go at it Trying to use a system of equations using the substitution method to eliminate one unknown but it didn't work.  I will try and explain what I was playing around with:\r<BR>\n" );
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document.write( "D1 = Distance there  D2 = Distance back ( but not sure if I needed this as it is same Distance )<BR>\n" );
document.write( "Average Speed = S  \r<BR>\n" );
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document.write( "D1/5 + D2/9 = S\r<BR>\n" );
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document.write( "D1/5 = D2/9+144 ( I tried substituting this in )\r<BR>\n" );
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document.write( "D2/9+144 + D2/9 = S ( then I combined the like terms )\r<BR>\n" );
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document.write( "D2/18+144 = s ( but this is where I realized I had failed as I still had 2 variables.\r<BR>\n" );
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document.write( "Please help me someone I am so bad at word problems and I would love to be confident at them. \r<BR>\n" );
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document.write( "P.S I wasn't sure about which was the outbound trip, I guessed it meant the trip back.\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 #363073 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=363073\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You almost had it, and then lost your sense of direction.<BR>\n" );
document.write( "You had <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=D%5B1%5D%2F5+=+D%5B2%5D%2F9%2B144 ALIGN=MIDDLE  ALT=\"D%5B1%5D%2F5+=+D%5B2%5D%2F9%2B144\"   DISABLED_style= \"max-width:90%; height:auto;\" > and you were saying it was the same distance both ways.<BR>\n" );
document.write( "So you could have written <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=D%2F5=D%2F9%2B144 ALIGN=MIDDLE  ALT=\"D%2F5=D%2F9%2B144\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Having fractions/denominators makes it look hard, but you could have solved it to find<BR>\n" );
document.write( "D=1620 km<BR>\n" );
document.write( "Now you have the distance. You already had the times. <BR>\n" );
document.write( "The only question is the average speed in the outbound trip. I believe outbound is the trip going out there, to Moscow, so the time was 5 hours and the speed was 1620 km/5 h = 324km/h </SPAN>\n" );
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