If 5x = 20, what is the value of x?

To solve the equation (5x = 20), we aim to isolate (x). This can be achieved by dividing both sides of the equation by 5.

Starting with the equation:

[ 5x = 20 ]

Dividing both sides by 5:

[ x = \frac{20}{5} ]

Calculating the right side gives:

[ x = 4 ]

Thus, the value of (x) is 4, confirming that the correct answer is indeed 4.

This approach is fundamental in algebra; rearranging equations to isolate variables by performing the same mathematical operation on both sides is a key skill. Performing different operations or miscalculating the division could lead to incorrect values, supporting why (4) is the only valid solution for this equation.