document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=384088>Question 384088</A>: <I><SPAN STYLE=\"word-break: break-all;\"> is x suppose to equal a number that should replace the x or is it all ways one </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #271876 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=271876\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a general expression, x represents any number.\r<BR>\n" );
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document.write( "To solve for a specific number, you replace x with that number in the equation.\r<BR>\n" );
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document.write( "example:\r<BR>\n" );
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document.write( "y = x^2 + 3*x - 5\r<BR>\n" );
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document.write( "If you want to know the value of y when x = 3, you replace x with 3 in the equation to get:\r<BR>\n" );
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document.write( "y = 3^2 + 3*3 - 5 = 9 + 9 - 5 = 18 - 5 = 13\r<BR>\n" );
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document.write( "When you get into functional notation (if not already), then you will see:\r<BR>\n" );
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document.write( "f(x) = x^2 + 3*x - 5\r<BR>\n" );
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document.write( "When x = 3, then you will see:\r<BR>\n" );
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document.write( "f(3) = 3^2 + 3*3 - 5\r<BR>\n" );
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document.write( "The 3 replaces the x to give you the value of the equation when x = 3.\r<BR>\n" );
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document.write( "If you want to know the value of y or f(x), when x = 5, then you replace x with 5, etc.\r<BR>\n" );
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