The property that can be used to expand the expression \( 5\left(\frac{3x - 6}{7}\right) \) is the Distributive Property.
Using the Distributive Property, you can distribute \( 5 \) to both terms in the fraction:
\[ 5\left(\frac{3x}{7} - \frac{6}{7}\right) = \frac{15x}{7} - \frac{30}{7} \]
So the correct response is Distributive Property.