help

I assume you want to solve for x. If that's not it, let me know and I'll do it how you ask.

$y=\frac{x}{3}-3$

First, you want to add 3 to both sides.

$y+3=\frac{x}{3}$

The multiply both sides by 3.

$x=3(y+3)$

Simplify.

$x=3y+9$