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

x₁ + 3x₂ + 3x₃ = 13

2x₁ + 5x₂ + 4x₃ = 23

2x₁ + 7x₂ + 8x₃ = 29

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