What is 3x+2x (x-1) = 9x+4

3x+2 (x-1) = 9x=4

We move all terms to the left:

3x+2 (x-1) - (9x) = 0

We add all the numbers together, and all the variables

-6x+2 (x-1) = 0

We multiply parentheses

-6x+2x-2=0

We add all the numbers together, and all the variables

-4x-2=0

We move all terms containing x to the left, all other terms to the right

-4x=2

x=2/-4

x=-1/2