Thanks The reduced row echelon form of the augmented matrix
Thanks
 The reduced row echelon form of the augmented matrix of a system of equation is given. Find the solutions of the system.  [1 0 0 0  13  0 1 0 0  0  0 0 1 0  -8  0 0 0 1  11/2]  (13, w, -8, 11/2) for any real number w  No solution  (13, -8, 11/2, 0)  (13, 0, -8, 11/2)Solution
The solution to this is D. ( 13, 0, -8, 11/2 )
This is because it is a reduced row echelon matrix and here x1 = 13 , x2 = 0 , x3 = -8 and x4 = 11/2

