
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 Mr. Johnson's physics class, there are 20 boys, and 30 students total bring their calculators to class. If only 15 of the students who brought calculators are girls, how many boys didn't bring their calculators to class?

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