document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=916637>Question 916637</A>: <I><SPAN STYLE=\"word-break: break-all;\"> log(base 4) (x+13) - log(base 4)(x-8) = 1\r<BR>\n" );
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document.write( "I know the answer is 15 but why in the beginning does it not combine? like log(base 4) ((x+13)(x-8))\r<BR>\n" );
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document.write( "Please explain<BR>\n" );
document.write( "Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #556166 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=556166\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=log%284%2C+%28%28x%2B13%29%2F%28x-8%29%29%29+ ALIGN=MIDDLE  ALT=\"log%284%2C+%28%28x%2B13%29%2F%28x-8%29%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 1 <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\large\ \ log_bx - log_by = log_b(x/y) \"><BR>\n" );
document.write( " <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\large\ \ log_b(x) \ = \ y \ \ \Rightarrow\ \ b^y = x\">\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%5E1+=+%28x%2B13%29%2F%28x-8%29+ ALIGN=MIDDLE  ALT=\"4%5E1+=+%28x%2B13%29%2F%28x-8%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "4(x-8) =  x+13<BR>\n" );
document.write( "4x - 32 = x+13<BR>\n" );
document.write( "3x=  45<BR>\n" );
document.write( "x = 15 </SPAN>\n" );
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