My brother is 4 times as old as I am. Six years from now, he will be twice as old as I will be.  How old is my brother now?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
My brother is 4 times as old as I am. Six years from now, he will be twice as old as I will be.  How old is my brother now?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
12
My brother is 4 times as old as I am. Six years from now, he will be twice as old as I will be.  How old is my brother now?
train