I need to find out how to solve a system of equations with the given matrix form:

AX=CX+B;

I know I need to make it in the form of X= with inverse of A and C as well as using the identity matrix

What I have guessed at the moment is

X= (I-A)^-1 + (I-C)^-1 + B

I am using excel as I have an equation I have to solve with this but if I can figure out the formula for this I can solve the problem fairly easy.

Thanks!