document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=820622>Question 820622</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a woman flies a small airplane from los angeles to san francisco and distance of 210 miles. Because she is flying into a head wind, the trip takes her 2.5 hours. On the way back, the wind is still blowing at the same speed, so the return trip takes her only 1.5 hours. What is her speed in still air and how fast is the wind blowing?\r<BR>\n" );
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document.write( "How can i set up the equations for this problem? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #493638 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><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=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=493638\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ---<BR>\n" );
document.write( "s = d / t<BR>\n" );
document.write( "d = s * t<BR>\n" );
document.write( "---<BR>\n" );
document.write( "up:<BR>\n" );
document.write( "D = (x - y) * 2.5<BR>\n" );
document.write( "2.5x - 2.5y = 210<BR>\n" );
document.write( "---<BR>\n" );
document.write( "down:<BR>\n" );
document.write( "D = (x + y) * 1.5<BR>\n" );
document.write( "1.5x + 1.5y = 210<BR>\n" );
document.write( "---<BR>\n" );
document.write( "system of equations:<BR>\n" );
document.write( "2.5x - 2.5y = 210<BR>\n" );
document.write( "1.5x + 1.5y = 210<BR>\n" );
document.write( "---<BR>\n" );
document.write( "copy and paste the above standard form linear equations in to this solver:<BR>\n" );
document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x= 112<BR>\n" );
document.write( "y= 28<BR>\n" );
document.write( "---<BR>\n" );
document.write( "answer:<BR>\n" );
document.write( "airplaine speed in still air = 112 mph<BR>\n" );
document.write( "wind speed = 28 mph<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve and graph linear equations:<BR>\n" );
document.write( "https://sooeet.com/math/linear-equation-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve quadratic equations, quadratic formula:<BR>\n" );
document.write( "https://sooeet.com/math/quadratic-formula-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve systems of linear equations up to 6-equations 6-variables:<BR>\n" );
document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );