document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=340418>Question 340418</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Is 3xy + 2y + 15z - 20 = 0 a linear equation? If not, why not? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #243939 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=243939\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Garamond\" size=\"+2\">\r<BR>\n" );
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document.write( "A linear equation is an equation in which ALL of the terms are degree 1.  The degree of a term is the SUM of the exponents on ALL of the variables in that term.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ 3xy\ +\ 2y\ +\ 15z\ -\ 20\ =\ 0\">\r<BR>\n" );
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document.write( "Rewrite including all of the understood exponents:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ 3x^1y^1\ +\ 2y^1\ +\ 15z^1\ -\ 20\ =\ 0\">\r<BR>\n" );
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document.write( "Note that the degree of the first term is 1 + 1 = 2, and therefore the equation is not linear.  If you go to <a  rel=nofollow HREF=\"http://www.algebrahelp.com/calculators/equation/3dgraphing/pg2.htm\">3D Graphing Calculator</a> and enter your equation, you will be able to see that the thing is non-linear.\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi} + 1 = 0\"><BR>\n" );
document.write( "My calculator said it, I believe it, that settles it<BR>\n" );
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