2. Use Cramer's Rule to solve the linear system. 16х, — 12х, — 12хз — 16х, = 16 -12x1 + 25x2 +x3 – 4x4 = -68 -12x1 + x2 + 17x3 + 14x4 = -20 -16x1 – 4x2 + 14x3 + 57x4 = 158

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