I don't see any answer choices, but because it already gives you x and y, all you have to do is plug them into the equation.
-(5)-(6)+z=0
combine like terms
-11 + z = 0
add 11 to both sides
z = 11 is your answer
Answer:
I would say c) is your answer beacause Commutative definition is changing the order of a pair of numbers.
Step-by-step explanation: