Here is my task:

Find inverse z transform of $X(z)=\frac{1}{2-3z}$, if $|z|>\frac{2}{3}$

I need to find it using definition formula, $x(n)=\frac{1}{2\pi j}\oint_{C}^{ } X(z)z^{n-1}dz$. How can I find it? Result is $-\frac{1}{3}(\frac{2}{3})^{n-1}u(n-1)$