At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
So the original equation is 3n + 2(n+2) = 9n + 12
So the first step is to distribute the 2 in 2(n+2). So that would be 2n +4.
The equation would then look like this : 3n + 2n + 4 = 9n +12.
So then combining the variable n on the left side of the equation. That would give us 5n.
The equation would then look like this : 5n + 4 = 9n + 12.
The goal is to get all of the variables on one side, with the constants on the other. So, personally, I would move the 5n and the 12 to the opposite side of the equal sign.
That would then make the equation look like this: -12 + 4 = 9n - 5n.
The positive and negative signs change when the numbers/variables change sides on the equations, so that's why the 12 now has a negative sign in front of it. Same with the 5n.
Now, we just have to combine the constants and the variables.
That would make the equation look like this: -8 = 4n.
Then, the goal is to get the variable alone, so that would mean dividing the 4 away from the n. When we do that, both sides of the equation must be divided by the same thing, so the -8 would be divided by the 4 also.
The equation would look like this: -2 = n.
So, the answer to the equation solving for n, would be -2. The second choice of the choices, which I am assuming is choice B.