document.write( "Question 260352: HElp! could you please do this (I couldn't)
\n" ); document.write( "Simplify: 9log(base 27)x - 4log(base 9)x
\n" ); document.write( "The answer is log(base3)x but I don't know how to get that! Thank you.
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Algebra.Com's Answer #191779 by drk(1908)\"\" \"About 
You can put this solution on YOUR website!
Here is the original problem
\n" ); document.write( "(i) \"9log%2827%2Cx%29+-+4log%289%2Cx%29+\"
\n" ); document.write( "Here are the step I took:
\n" ); document.write( "step 1 - write \"9log%2827%2Cx%29+=+Y\" and solve for Y
\n" ); document.write( "\"27%5EY+=+x%5E9\"
\n" ); document.write( "\"%283%5E3y%29+=+x%5E9\"
\n" ); document.write( "taking a log base 3 of both sides, we get
\n" ); document.write( "\"3y+=+log%283%2Cx%5E9%29\"
\n" ); document.write( "\"y+=+%289%2F3%29log%283%2Cx%29+=+3log%283%2Cx%29\"
\n" ); document.write( "--
\n" ); document.write( "step 2 - write \"4log%289%2Cx%29+=+Z\" and solve for Z
\n" ); document.write( "\"9%5EZ+=+x%5E4\"
\n" ); document.write( "\"%283%5E2Z%29+=+x%5E4\"
\n" ); document.write( "taking a log base 3 of both sides, we get
\n" ); document.write( "\"2Z+=+log%283%2Cx%5E4%29\"
\n" ); document.write( "\"y+=+%284%2F2%29log%283%2Cx%29+=+2log%283%2Cx%29\"
\n" ); document.write( "--
\n" ); document.write( "step 3 - rewriting steps 1 and 2, we get
\n" ); document.write( "\"3log%283%2Cx%29+-+2log%283%2Cx%29\"
\n" ); document.write( "which is simply
\n" ); document.write( "\"log%283%2Cx%29\"
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