Solve the matrix equation AX = B for X. 11 2 4 A= 21 B= 12 4 2 7 12 X = 0 Solve the matrix equation AX = B for X. 7 1-2-3 A= -1 4 6 B= 5 1 -1 -2 3 X= Use the inverse of the coefficient matrix to solve the system of equations. X+ 4y + 3z = -8 X-Gy - 6z = 50 2x + 5y + 4z = 11 Identify the inverse of the coefficient matrix. (Type an integer or simplified fraction for each matrix element.)