
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
In a parking lot, there are 30 vehicles, including cars and motorcycles. Cars have 4 wheels, and motorcycles have 2 wheels. There are only cars and motorcycles in the parking lot, and together they have 84 wheels. Calculate the number of motorcycles in the parking lot.

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