ПОМОГИТЕ РЕШИТЬ!!!3sin(x/3)-sqrt(3)cos(x/3)=3

$3sin (\frac{x}{3})-\sqrt{3}cos(\frac{x}{3})=3$
$\frac{\sqrt{3}}{2}sin(\frac{x}{3})-\frac{1}{2}cos(\frac{x}{3})=\frac{\sqrt{3}}{2}$
$cos \frac{\pi}{6}sin(\frac{x}{3})-sin \frac{\pi}{6}cos(\frac{x}{3})=\frac{\sqrt{3}}{2}$
$sin(\frac{x}{3}-\frac{\pi}{6})=\frac{\sqrt{3}}{2}$
$\frac{x}{3}-\frac{\pi}{6}=(-1)^k*\frac{\pi}{3}+\pi*k$
, k є Z
$x=\frac{\pi}{2}+(-1)^k*\pi+3*\pi*k$
k є Z