Let
1) a11 x1 + a12 x2 + a13 x3 = b1
2) a21 x1 + a22 x 2+ a23 x3 = b2
3) a31 x1 + a32 x 2+ a33 x 3 = b3
SHOW that if det(A) does not equal 0, where det (A) is the determinant of the coefficient matrix, then x2= det(A2)/det(A)
where det (A2) is the determinant obtained by replacing the second column of det (A) by (b1, b2, b3) to the power T.
Please assist.