document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=623143>Question 623143</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is linear equation in 2 variables? \r<BR>\n" );
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document.write( "Is 2x – 3/y = 7 a linear equation in 2 variables? \r<BR>\n" );
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document.write( "Why, and why not?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #391902 by </B><A HREF=/tutors/aboutme.mpl?userid=fcabanski><B>fcabanski(1391)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fcabanski><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=391902\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A linear equation has many forms.  One is y = mx + b.  That is not a linear equation because y is in the denominator.  <P><BR>\n" );
document.write( "-3/y = 7 -2x<P><BR>\n" );
document.write( "3/y = 2x - 7<BR>\n" );
document.write( "y = 3/(2x-7)<P><BR>\n" );
document.write( "When x is 3.5, y is undefined because the denominator is 0.  If you plot it, it's not a line.<P><BR>\n" );
document.write( "A simple rule of thumb is a linear equation cannot have x or y in a denominator.<BR>\n" );
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