If a² – by – cz = 0, ax – b² + cz = 0 and ax + by – c² = 0, then the value of x/(a + x) + y/(b + y) + z/(c + z) will be - CDS Elementary Mathematics 2016 (I)

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If a² – by – cz = 0, ax – b² + cz = 0 and ax + by – c² = 0, then the value of x/(a + x) + y/(b + y) + z/(c + z) will be