Solve for x in the equation 4x - 12 = 0.

To solve the equation 4x - 12 = 0, you start by isolating the variable x. First, adding 12 to both sides of the equation gives you 4x = 12. This step simplifies the equation, making it clearer and easier to work with.

Next, to find the value of x, divide both sides of the equation by 4. This gives you x = 12 / 4, which simplifies to x = 3.

Therefore, the solution to the equation is x = 3, which is why this is the correct choice. This method of isolating x by performing inverse operations is fundamental in solving linear equations and helps ensure that you arrive at the correct answer.