document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=259048>Question 259048</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the difference between a variable, a variable expression, and an equation? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #190731 by </B><A HREF=/tutors/aboutme.mpl?userid=drk><B>drk(1908)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=drk><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=190731\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A variable is just any letter of the alphabet that stands for some unknown amount. X and Y are the most common variables.\r<BR>\n" );
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document.write( "EX: X<BR>\n" );
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document.write( "A variable expression is numbers, letters, +,-, x, /, signs, but NO EQUAL sign.<BR>\n" );
document.write( "EX: 2x^2 - 3x + 43<BR>\n" );
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document.write( "An equation contains an equal sign somewhere<BR>\n" );
document.write( "EX: 5 + x = 10<BR>\n" );
document.write( "EX: x^2 + 2x + 4 = 0<BR>\n" );
document.write( "EX: 2x^2 + 5y^2 = 1 </SPAN>\n" );
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