Solve for all the forces using gauss seidel method 6006 c D

Solve for all the forces using gauss seidel method.

Solution

Solve Ax = b

A = L + U

L =

-0.8000 0 0 0 0 0 0 0
-0.6000 0 0 0 0 0 0 0
0.8000 0 -0.8000 0 0 0 0 0
0.6000 0 0.6000 0 0 0 0 0
0 0 0 1.0000 0 0 0 0
0 0 0 0 -1.0000 0 0 0
0 -1.0000 -0.6000 0 0 0 0 0
0 0 0.8000 0 1.0000 0 0 0

U =

0 1 0 0 0 0 0 0
0 0 0 0 0 0 0 1
0 0 0 -1 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 -1 0 0
0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0

b =

0
0
0
400
0
0
600
0

But the Matrix is not invertible

Not possible