
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
The school uses a sum of money to buy prizes. If one pen and two notebooks are considered as one set of prizes, then 60 sets of prizes can be bought; if one pen and three notebooks are considered as one set of prizes, then 50 sets of prizes can be bought. How many pens can be bought with all the money?

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