I'm having a bit of a struggle with my assignment. I'm supposed to find what is x in AxB = (B-1A-1)-1 . I'm stumped at what to do with this. My friend said that x is I (identity matrix), but he is unable to prove it as well. My linear algebra class just recently started doing this topic and I haven't fully absorbed the subject yet. Any hints or tips would be helpful though. Thanks!