
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
In the last World Cup, the number of goals scored by four football teams, A, B, C, and D, were 9, 9, x, and 7, respectively. If the mode and the mean of this data set are equal, what is the median of this data set?

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