When I tried to solve the equation below, I got the $4$ errors. Since I am pretty new on Mathematica, I don't know what I did wrong.
This system is set to solve in Jacobi method after $40$ iterations. Initial approximation is $x_1(0)=0, x_2(0)=0, x_3(0)=0$. I would appreciate it if someone could recommend other methods that I can use for this system!