If a, B and C satisfy the absolute value of (A-1) + [2 (B-3)] + (C-4), the value of 2A + 3B + 4C is obtained

Because | A-1 | + | 2 (B-3) | + | C-4 | = 0
So a = 1, B = 3, C = 4
So 2A + 3B + 4C = 2 + 9 + 16 = 27
A: the value of 2A + 3B + 4C is 27

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