Answer
The equivalent interval notation is $(\frac{1}{6},1)$
Work Step by Step
$2$ $\gt$ $- 6x + 3$ $\gt$ $- 3$
$2 - 3$ $\gt$ $- 6x$ $\gt$ $- 3 -3$
$\frac{-1}{-6}$ $\lt$ $x$ $\lt$ $\frac{-6}{-6}$ (Inequality sign reversed because of multiplication of -6)
$\frac{1}{6}$ $\lt$ $x$ $\lt$ $1$
The equivalent interval notation is $(\frac{1}{6},1)$