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2 (5x + 3 - x) - [x - (5 + 2x)] = 3 [x + 2 (2x + 4)]
10x + 6 - 2x - [x - 5 - 2x] = 3 [x + 4x + 8]
10x + 6 - 2x - x + 5 + 2x = 3x + 12x + 24
10x - 2x - x + 2x - 3x - 12x = 24 - 6 - 5
-6x = 13
x = 13/6
x = -13/6 → respuesta