1. The problem statement, all variables and given/known data I cannot figure out how to find the decryption key for a hill cypher. My textbook and a bunch of websites say that is just the inverse of the encryption key, but that is not working for me. 2. Relevant equations A = [1,2,3] [4,5,6] [7,8,10] 3. The attempt at a solution A^(-1) = [-2/3, -4/3, 1] [-2/3, 11/3, -2] [1, -2, 1] But this does not properly decrypt my message. Anyone know what I'm missing?