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Option 1 : 1

**Given:**

x = (a + b - c)/c, = (a - b + c)/b = (b + c - a)/a

**Concept:**

When two and more ratios are equal, each of the ratios are equal to sum of the numerators divided by the sum of the denominators, provided sum of the denominators is non zero

**Calculation:**

⇒ x = (a + b - c)/c, = (a - b + c)/b = (b + c - a)/a

⇒ x = (a + b - c + a - b + c + b + c - a)/(a + b + c)

⇒ x = 1 as a + b + c is non zero

**∴ The required result will be 1.**

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