If $500 - 90 + 7 = 400 - 60 + 5 + N$, what is the value of $N$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If $500 - 90 + 7 = 400 - 60 + 5 + N$, what is the value of $N$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
72
If $500 - 90 + 7 = 400 - 60 + 5 + N$, what is the value of $N$?
train