Use elementary row operations to transform the augmented coefficient matrix to echelon form. Then solve the system by back substitution. S c X₁ - 4x₂ + 5x3 = 27 2x₁ + x₂ + x3 = 9 - 3x₁ + 2x₂ - 2x3 = - 19 Show Transcribed Text An echelon form for the augmented coefficient matrix is There is a unique solution, x1=__, x2=__, x3=__.

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