10
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If $f(x) = 3x + 1$, what is $f(3)$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
10
If $f(x) = 3x + 1$, what is $f(3)$?
train