If a + b + c = 3x, then find the value of (x – a)³ + (x – b)³ + (x – c)³ – 3(x – a)(x – b) (x – c).

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If a + b + c = 3x, then find the value of (x – a)³ + (x – b)³ + (x – c)³ – 3(x – a)(x – b) (x – c).
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