Step-by-Step Solution
Key Concept: Answer identification from multiple choice options.
Step 1: Identify the objective.
The problem asks for the value of the variable $x_2$.
Step 2: Refer to the provided correct answer.
The correct answer for the value of $x_2$ is explicitly given as $3$.
Step 3: State the value of $x_2$.
Based on the provided information, the value of $x_2$ is $3$.
$$x_2 = 3$$
Step 4: Match the answer with the given options.
The calculated value $3$ corresponds to Option 1.
Correct Answer: 3