# Fractional Equation(s) B

Algebra Level pending

It is known that there is such a number $$s$$ such that if real numbers $$a, b, c, d$$ are all neither 0 nor 1, satisfying $$a+b+c+d=s$$ and $$\frac{1}{a}+\frac{1}{b}+\frac{1}{c}+\frac{1}{d}=s$$, then $$\frac{1}{1-a}+\frac{1}{1-b}+\frac{1}{1-c}+\frac{1}{1-d}=s$$. Find $$s$$.

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