document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=840608>Question 840608</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Against the wind a small plane travels 175 miles in 1 hour and 10 minutes. The trip back only took 50 minutes. What was the speed of the wind? What was the speed of 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 #506332 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</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=506332\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 70 minutes against wind or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2F6 ALIGN=MIDDLE  ALT=\"7%2F6\"   DISABLED_style= \"max-width:90%; height:auto;\" > hours;<BR>\n" );
document.write( "r plane if no wind<BR>\n" );
document.write( "w speed of wind\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%2At=d ALIGN=MIDDLE  ALT=\"R%2At=d\"   DISABLED_style= \"max-width:90%; height:auto;\" >, for Rate, Time, Distance\r<BR>\n" );
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document.write( "_________________speed___________time___________distance<BR>\n" );
document.write( "AGAINST__________r-w_____________7/6____________d=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28r-w%29%287%2F6%29=175 ALIGN=MIDDLE  ALT=\"%28r-w%29%287%2F6%29=175\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "WITH_____________r+w_____________5/6____________d=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28r%2Bw%29%285%2F6%29=175 ALIGN=MIDDLE  ALT=\"%28r%2Bw%29%285%2F6%29=175\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Two equations in the two unknowns, r and w.  Both equations linear. </SPAN>\n" );
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