
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given vectors $\overset{\to }{a} = (1, 1)$ and $\overset{\to }{b} = (2, x)$, if $\overset{\to }{a} + \overset{\to }{b}$ is parallel to $\overset{\to }{a} - \overset{\to }{b}$, then the value of the real number $x$ is (   ).

Present the answer in LaTex format: \boxed{Your answer}
user