The third term of an arithmetic sequence is $5$ and the sixth term is $-1.$ Find the twelfth term of this sequence.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
The third term of an arithmetic sequence is $5$ and the sixth term is $-1.$ Find the twelfth term of this sequence.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
-13
The third term of an arithmetic sequence is $5$ and the sixth term is $-1.$ Find the twelfth term of this sequence.
train