Solve, showing and explaining all steps in the process. 7x - 9 - 4(x - 1) = 28

x = 12

Step-by-step explanation:

First use PEMDAS. Parenthesis first. You get 7x - 9 - 4x + 1 = 28. Then you should combine like terms (7x - 4x) and (-9 + 1). You then get 3x - 8 = 28. Next, you add 8 on both sides to get 3x alone. You end up with 3x = 36. Divide both sides by 3 to get x alone. You wind up with: x=12.

i think the answer is d im not sure