Solve for x: 3x - 9 = 0.

To solve the equation (3x - 9 = 0), start by isolating the variable (x). First, add 9 to both sides of the equation:

[

3x - 9 + 9 = 0 + 9

]

This simplifies to:

[

3x = 9

]

Next, divide both sides by 3 to solve for (x):

[

x = \frac{9}{3}

]

This reduces to:

[

x = 3

]

Thus, the value of (x) that satisfies the equation is 3, which corresponds to one of the choices. This means that when (x) is substituted back into the original equation, it balances to equal zero, confirming the solution is correct. The process of isolating the variable and simplifying confirms that the correct answer is the value of 3.