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 + x₂ - 3x₃ = 6

2x₁ + 7x₂ + x₃ = -9

2x₁ + 5x₂ = -5

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