document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=685595>Question 685595</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find all the real number roots of the equation.\r<BR>\n" );
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document.write( "log2(x+7)-log2(x-3)=3 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #424507 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=424507\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find all the real number roots of the equation. <BR>\n" );
document.write( "log2(x+7)-log2(x-3)=3<BR>\n" );
document.write( "log2[(x+7)/(x-3)]=3<BR>\n" );
document.write( "convert to exponential form<BR>\n" );
document.write( "(x+7)/(x-3)=2^3=8<BR>\n" );
document.write( "x+7=8x-24<BR>\n" );
document.write( "7x=31<BR>\n" );
document.write( "x=31/7=4.4286.. </SPAN>\n" );
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