Algebra-1

Question Analysis
This question tests the student's ability to apply the associative property in a more complex expression involving both addition and variables. The problem requires the student to regroup and combine like terms.

Key Concept Explanation
The associative property of addition states that for any real numbers , , and , . This property allows the regrouping of addends without changing the sum.

Step-by-step Solution
1. Start with the expression:
2. Remove the parentheses:

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