Solve the following system by applying the Cramer's rule and find the determinant of matrix A (det (A)) and the first component (x₁) of the solution. x1+x2+6x3=7 -X1+2x2+9x3=2 ₁-2x2+3x3 = 10 O x1 ○ det (A) = 4, x₁ = -1/ O det (A) = 36, x₁ = 3 O det (A) = -20, x₁ = -1 ○ det(A) = 20, x₁ = 1 O det (A) = -20, x₁ = 1

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