
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
Fill the numbers 1 to 9 in the boxes so that three equations hold, and the sum of the three numbers in the blue rectangular box is 15. Given that 2, 5, and 8 are already filled in, place the number at "?"

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