Could someone help with these equations? Thank you

HOW TO UNENCRYPT A MATRIX AB = X where A equals the Unencrypted Matrix, B is the encoding matrix and X is the Encrypted Matrix. Thus to discover the unecrypted matrix, you must find the inverse of B [the encoding matrix] and then XB* = A CRYPTEX #1 Encrypted Matrix Encoding Matrix Encoding Inverse 52 69 X = B = 3 4 64 -92 Unencrypted Matrix Clark Creative Education CRYPTEX #2 Encrypted Matrix Encoding Matrix Encoding Inverse 56 -110 3 -6 X = B= 16 -22 -1 4 Unencrypted Matrix