Describe the solution set, x= x₂ of x₁ + 4x2 - 7x3 = -6 in parametric vector form. Select the correct choice X3 below and fill in the answer boxes within your choice. (Type an integer or fraction for each matrix element.) O A. X= OB. X= O C. x= OD. X=X₂ +X3 +x₂ +X3 +X3

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