Question 1166818
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Why did you stop your trials ?



Try again . . . 



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<pre>
Start from 

    {{{5 - 3^x}}} = {{{-40}}}


Move the term  {{{3^x}}}  from the left side to the right side, changing its sign.

Move the term -40  from the right side to the left side, changing its sign.


You will get

     5 + 40 = {{{3^x}}}.


It is the same as

     {{{3^x}}} = 45.


Take logarithm base 10 of both sides.  You will get

    {{{x*log(10,(3))}}} = {{{log(10,(45))}}}.


It implies

    x = {{{log(10,(45))/log(10,(3))}}} = use your calculator = 3.465.    <U>ANSWER</U>
</pre>

Solved.



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I have read your last post.


Let me tell it honestly:  &nbsp;&nbsp;I never saw so low level knowledge in Math.


And never even could suggest that so low level is possible.



Have a nice day &nbsp;(!)