# Unit fraction = $$\frac{1}{x}$$ for some positive integer $$x$$

If the fraction $$\dfrac{p-1}{p}$$ for a prime $$p\geq5$$ can be expressed as two distinct unit fractions $$\dfrac{1}{a}$$ and $$\dfrac{1}{b}$$. Find $$a+b$$.

Enter -69 if you think it cannot be done.

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