The answer is D, x = 3.
To find the answer to this, we need to solve for x.
4(x - 1) = 2(x + 1)
The first step is to either use the distributive property and get rid of the parenthesis or to divide each side by two. This shows division by two.
2(x - 1) = x + 1
Now we can get rid of the parenthesis
2x - 2 = x + 1
We want to get the numbers on one side and the variables on another
2x - x = 1 + 2
x = 3