To isolate the value of x in the equation x/4 = ?, you would need to multiply both sides of the equation by 4. This will cancel out the division by 4 on the left side, leaving you with x = 4 * ?.
For example, if the equation is x/4 = 5, you would multiply both sides by 4 to get x = 4 * 5, which simplifies to x = 20.