Answer:
B. Addition Property of Equality.
Explanation:
3z/2 - 5 = 10, the step shown is adding 5 to both sides of the equation:
3z/2 - 5 + 5 = 10 + 5
By adding 5 to both sides, we are maintaining the equality of the equation. This step allows us to isolate the variable term, 3z/2, on one side of the equation. Therefore, the answer is B. Addition Property of Equality.