Question

-7x - 12 = - 7х + 3(-4 - x)

Answer 1

`x=0`

Explanation:

`-7x - 12 = - 7x + 3(-4 - x)`

Open up the parentheses

`-7x - 12 = - 7x -12-3x`

-7x cancels out on both sides

`-12 =-12-3x`

-12 cancels out on both sides

`0=-3x\\x=0`

I hope this helps!