Let J represent John’s age.

We have J + 9 = 3(j − 11)

So, J + 9 = 3J − 33

So, 9 = 2J − 33

So, 42 = 2J

Which means that John’s age is J = 42 / 2 = <<42/2=21>>21

# Answer

21
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
9 years from now, John will be 3 times as old as he was 11 years ago. How old is he now?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
21
9 years from now, John will be 3 times as old as he was 11 years ago. How old is he now?
train