Use an inverse atrix to (a) x₁ + 2x₂ + x3 = -2 X1 + 2x2x3 = -4 X1 2x₂ + x3 = 2 - (X1, X2, X3) = (b) x₁ + 2x₂ + x3 = 1 3 X₁ + 2x2x3 = X1 - 2x₂ + x3 = -3 (X1, X2, X3) = = ])

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