\fUse the inverse of the coefficient matrix to solve the system of equations. x + 2y + 3z = 21 2x + 3y + 4z = 4 - x -2y - 2z = - 31 . . . Identify the inverse of the coefficient matrix. (Type an integer or simplified fraction for each matrix element.)Use the inverse of the coefficient matrix to solve the system of equations. X + 4y + 3z = -28 X - 3y - 2z = 17 2x + 5y + 4z = - 12 . . . (x,y,z) = D (Type an ordered triple, using integers or fractions.)