
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
Jack and Tom bought identical packs of stationery, which contained the same number of sheets of paper and the same number of envelopes. Jack used his pack to write 2-sheet letters and had 90 sheets of paper left, while Tom used his pack to write 4-sheet letters and had 30 envelopes left. Determine the total number of sheets of paper in a pack.

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