If 5x = 25, what is the value of x?

To find the value of x in the equation 5x = 25, the goal is to isolate x. This is accomplished by dividing both sides of the equation by 5. Here's how it works step-by-step:

1. Start with the equation: 5x = 25.

2. To isolate x, divide both sides by 5:

( x = \frac{25}{5} ).

3. Simplifying this gives:

( x = 5 ).

Thus, the value of x is 5. This matches with the correct choice provided. The isolation of x through division is a fundamental property of equations, enabling the solver to determine the unknown variable.