
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
Anton sold rabbits, an equal number every day. On the first day, 20% of all the rabbits were bought by Grandma #1, 1/4 of the remaining rabbits were taken by Man #1, then an unknown person X bought some rabbits, and Anton had 7 rabbits left. On the second day, 25% of all the rabbits were bought by Grandma #2, 1/3 of the remaining rabbits were taken by Man #2, then the unknown person X bought twice the number of rabbits he bought on the first day, and Anton had no rabbits left. How many rabbits did the unknown person X buy on the first day?

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