natewestly6061 natewestly6061 01-06-2023 Mathematics contestada Use elementary row operations to transform the augmented coefficient matrix to echelon form. Then solve the system by back substitution. X₁ - 2x₂ + 3x3 = 29 2x1 + x2 + x3 = 8 - 3x₁ + 3x₂ - 2x3