If
$$\frac{5x-7}{(x-1)^3} = \frac{A}{x-1}+\frac{B}{(x-1)^2}+\frac{C}{(x-1)^3},$$find $A+B+C$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If
$$\frac{5x-7}{(x-1)^3} = \frac{A}{x-1}+\frac{B}{(x-1)^2}+\frac{C}{(x-1)^3},$$find $A+B+C$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
3
If
$$\frac{5x-7}{(x-1)^3} = \frac{A}{x-1}+\frac{B}{(x-1)^2}+\frac{C}{(x-1)^3},$$find $A+B+C$.
train