Hello everyone, I have a small issue while solving an equation in the form of slope-intercept, they give me an equation and ask me to solve it and graph it.

Formula Given for Graphing: y=mx+b

Equation: -3x - 6y = 12

So I know I have to solve for y, so here's what I do:

add -3x to 12, and that's where I get lost. I saw a video on youtube that said when you do that, you don't really add the -3x to 12, it just becomes the slope in the next step so for example it would be: -6y=-3x + b? Not sure if that's right.

Help is appreciated, thanks.