I wasn't sure if linear algebra was precal or not... hopefully I posted this in the right place. 1. The problem statement, all variables and given/known data A, X and B are all matrices. X and B are known. AX=B How do you find A? 2. Relevant equations None. 3. The attempt at a solution I know that if you needed to find X, you could construct a matrix where: [A|B], transform to RREF, and read off the solutions which would be A, right? But since AX does not equal XA, I guess you can't do that here. Maybe not... Does it have something to do with matrix inverses? I can't find this in my textbook anywhere!! Thanks in advance for any help.