To solve the equation \( \frac{x}{5} = -6 \), you can multiply both sides of the equation by 5. This will eliminate the fraction:
\[ 5 \cdot \frac{x}{5} = 5 \cdot (-6) \]
This simplifies to:
\[ x = -30 \]
So, you should multiply both sides of the equation by 5 to solve for \( x \).