20
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Compute the sum of the number $10 - \sqrt{2018}$ and its radical conjugate.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
20
Compute the sum of the number $10 - \sqrt{2018}$ and its radical conjugate.
train