To solve the equation \( \frac{x}{4} = 12 \) using the inverse operation, we need to perform the opposite operation of division, which is multiplication.
- Multiply both sides of the equation by 4 to isolate \( x \): \[ x = 12 \times 4 \] \[ x = 48 \]
Thus, the correct option is:
C. Inverse operation is multiplication; x = 48