
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
John is 20 years younger than his dad and 15 years younger than his mom. The sum of John's age and his dad's age is 80 years, and the age difference between his mom and dad is 5 years. How many years old is John?

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