Answer
No answer.
Work Step by Step
The given expression can be written as:
$ (\dfrac{1}{3})^x =-3$
We need to take log of both sides and apply logarithmic property : $\log a^ b=b \log a$ .
$ x \log (\dfrac{1}{3}) =- \log 3$
But we cannot take log of the negative numbers, so we get No answer.