Question: In Problems 1122, use elementary row operations to transform each augmented coefficient matrix to echelon form. Then solve the system by back substitution. 3x 1

In Problems 11–22, use elementary row operations to transform each augmented coefficient matrix to echelon form. Then solve the system by back substitution.

3x₁ - 6x₂ - 2x₃ = 1

2x₁ - 4x₂ + x₃ = 17

x₁ - 2x₂ - 2x₃ = -9

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