Geometry

Question Analysis:
This question involves identifying the correct reason for applying the Addition Property of Equality in a two-column proof.
The main focus is on understanding how equality properties are used to isolate a variable.

Key Concept Explanation:
The Addition Property of Equality states that if , then .
In this proof, it is used to add 4 to both sides of the equation .

Step-by-Step Solution:
1. The equation

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