
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
On the number line, points $A$ and $B$ are on the same side of the origin $O$, representing numbers $a$ and $1$ respectively. Point $A$ is moved $3$ units to the left to point $C$. If the numbers represented by points $C$ and $B$ are opposite, find the value of $a$.

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