<PRE><B>Question 22298</B>
&lt;pre&gt;&lt;font size = 4&gt;&lt;b&gt;You need these facts:

(1)   log&lt;sub&gt;B&lt;/sub&gt;A + log&lt;sub&gt;B&lt;/sub&gt;C = log&lt;sub&gt;B&lt;/sub&gt;(AC)

(2)   If log&lt;sub&gt;B&lt;/sub&gt;A = log&lt;sub&gt;B&lt;/sub&gt;C then A = C, if B &gt; 0 and B &lt;font face=&quot;symbol&quot;&gt;š&lt;/font&gt; 1

log&lt;sub&gt;3&lt;/sub&gt;5 = log&lt;sub&gt;3&lt;/sub&gt;x &amp;#8722; log&lt;sub&gt;3&lt;/sub&gt;4

Add log&lt;sub&gt;3&lt;/sub&gt;4 to both sides to get as many terms positive as possible

log&lt;sub&gt;3&lt;/sub&gt;5 + log&lt;sub&gt;3&lt;/sub&gt;4 = log&lt;sub&gt;3&lt;/sub&gt;x

Use (1)

log&lt;sub&gt;3&lt;/sub&gt;(5ˇ4) = log&lt;sub&gt;3&lt;/sub&gt;x

Rewrite 5ˇ4 as 20

log&lt;sub&gt;3&lt;/sub&gt;20 = log&lt;sub&gt;3&lt;/sub&gt;x  

Use (2):

20 = x

Edwin
AnlytcPhil@aol.com&lt;/pre&gt;

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