Answer:
3
Explanation:
To solve this, we need to plug in each of the numbers to the equation.
x = 3, y = - 4, z = - 6

Let's solve the parenthesis first. - 2 * 3 = - 6.

We then subtract -6 - 6.

Then, we divide (cancel out the negatives).

Our final answer is 3. Hope this helps!