document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=35326>Question 35326</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Problem goes like this...\r<BR>\n" );
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document.write( "Solve Equation.\r<BR>\n" );
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document.write( "log2 (5x+7) - log2 x = 2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #21448 by </B><A HREF=/tutors/aboutme.mpl?userid=narayaba><B>narayaba(40)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=narayaba><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=21448\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> log2 (5x+7) - log2 x = 2\r<BR>\n" );
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document.write( "log2(a) - log2(b) = log2 (a/b)\r<BR>\n" );
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document.write( "using the above identity<BR>\n" );
document.write( "log2 ((5x+7)/x) = 2\r<BR>\n" );
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document.write( "log 2 to the base 2 is 1 i.e log2 2 = 1 <BR>\n" );
document.write( "2 can be written as 2*1 = 2log2 (2) =  log2 (4)\r<BR>\n" );
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document.write( "log2 ((5x+7)/x) = log2 (4)\r<BR>\n" );
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document.write( "since the log on the right and the left side is with the same base<BR>\n" );
document.write( "(5x + 7)/x = 4<BR>\n" );
document.write( "5x + 7 = 4*x<BR>\n" );
document.write( "x = -7 </SPAN>\n" );
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