document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=26425>Question 26425</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane took 2 hours to fly 600 km against a head wind.  The return trip with the wind took 1 2/3 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 #14266 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=14266\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the speed of the plane be y<BR>\n" );
document.write( "Let the speed of the wind be x<BR>\n" );
document.write( "1 2/3 = 5/3<BR>\n" );
document.write( "Against = -<BR>\n" );
document.write( "With = +\r<BR>\n" );
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document.write( "2(x-y)=600 ------>2x-2y=600 (solve for y)<BR>\n" );
document.write( "x-y=300<BR>\n" );
document.write( "y=300+x (subsitution)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285%28x%2By%29%29%2F3=600 ALIGN=MIDDLE  ALT=\"%285%28x%2By%29%29%2F3=600\"   DISABLED_style= \"max-width:90%; height:auto;\" >----><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5x%2F3%2B5y%2F3=600 ALIGN=MIDDLE  ALT=\"5x%2F3%2B5y%2F3=600\"   DISABLED_style= \"max-width:90%; height:auto;\" > apply subsitution.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5x%2F3%2B%285%28300%2Bx%29%29%2F3=600 ALIGN=MIDDLE  ALT=\"5x%2F3%2B%285%28300%2Bx%29%29%2F3=600\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5x%2F3%2B%281500%2B5x%29%2F3=600 ALIGN=MIDDLE  ALT=\"5x%2F3%2B%281500%2B5x%29%2F3=600\"   DISABLED_style= \"max-width:90%; height:auto;\" > ---> Remove the fraction by multipling the equation by 3.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%285x%2F3%29%2B3%28%281500%2B5x%29%2F3%29=3%28600%2F1%29 ALIGN=MIDDLE  ALT=\"3%285x%2F3%29%2B3%28%281500%2B5x%29%2F3%29=3%28600%2F1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "5x+1500+5x=1800<BR>\n" );
document.write( "10x=300<BR>\n" );
document.write( "x=30<BR>\n" );
document.write( "y=300+(30)<BR>\n" );
document.write( "y=330\r<BR>\n" );
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document.write( "Hence, the speed of the wind is 30 mph and the speed of the plane is 330 mph (in still air).<BR>\n" );
document.write( "Paul. </SPAN>\n" );
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