document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=436260>Question 436260</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve for x\r<BR>\n" );
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document.write( "log(base 10)X+log(base 10)(X+1) = log(base 10)12 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #301823 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=301823\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> log(base 10)X+log(base 10)(X+1) = log(base 10)12<BR>\n" );
document.write( "log(base 10)X(X+1) = log(base 10)12<BR>\n" );
document.write( "X(X+1) = 12<BR>\n" );
document.write( "X^2+X = 12<BR>\n" );
document.write( "X^2+X-12 = 0<BR>\n" );
document.write( "(X+4)(X-3) = 0<BR>\n" );
document.write( "X = {-4,3}<BR>\n" );
document.write( "Throw out the negative solution (extraneous) leaving:<BR>\n" );
document.write( "X = 3<BR>\n" );
document.write( " </SPAN>\n" );
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