
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
A certain clothing factory is preparing to process 300 sets of "International Women's Day" performance costumes. After processing 60 sets, a new technology is adopted, which doubles the daily work efficiency compared to before. As a result, the task is completed in 9 days. Find out how many sets of costumes the factory originally processed per day. Let $x$ represent the number of sets of costumes processed per day by the factory originally. The equation is: ____.

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