To determine the correct property of equality that justifies the step in your equation, we need to examine the equation presented:
From the step: \[ -5 + 5 = 10 + 5 \]
This operation involves adding 5 to both sides of the equation. Therefore, the property being used here is the Addition Property of Equality, which states that if you add the same value to both sides of an equation, the two sides remain equal.
Thus, the correct answer is:
- Addition Property of Equality.
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