document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=913547>Question 913547</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Plane flies from Det. to Den. it has to fly against the wind and takes 8 hours. On return it goes with wind takes 7 hours. If distance between Det. and Den. is 1120 miles what as speed of the airplane in still are ? What was speed of wind ? \r<BR>\n" );
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document.write( "1120=8p-8w   <BR>\n" );
document.write( "1120=7p+7w\r<BR>\n" );
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document.write( "p represents plane w wind I got this far and am confused since I<BR>\n" );
document.write( "cant substitute ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #554580 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</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=554580\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> p for speed of the PLANE if no wind<BR>\n" );
document.write( "w for speed of wind entirely in one direction or the other direction\r<BR>\n" );
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document.write( "__________________rate__________time_________distance<BR>\n" );
document.write( "DET to DEN________p-w____________8___________1120<BR>\n" );
document.write( "DEN to DET________p+w____________7___________1120\r<BR>\n" );
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document.write( "The uniform rates travel rule is RT=D rate time distance.  Your data give two linear equation in the variables p and w.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28system%28%28p-w%29%2A8=1120%2C%28p%2Bw%29%2A7=1120%29%29 ALIGN=MIDDLE  ALT=\"highlight%28system%28%28p-w%29%2A8=1120%2C%28p%2Bw%29%2A7=1120%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "Solve the system.<BR>\n" );
document.write( "This IS just as you have; which is two equation in two unknowns.  YES, substitute!  Do you prefer to use the elimination method?  You can use that if you want instead.\r<BR>\n" );
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document.write( "My impression is that you are only temporarily stuck on nothing.  You only <i>believe</i> you are stuck. </SPAN>\n" );
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