One of my plans that I ditched cause it would be to hard....
Here are three examples to get you on the track:
2+4=6
6+6=14
7+2=11
Than one og the "variables" in the coordinates would be like this...
15 + 26 = AA
Its realy quite easy if you get the right approach.....
(and if you solved it please PM me like Strapped-4-Cache did so the puzzle isnt spoiled...)
Ole