Despite appearances, it really is only very simple/basic algebra. Assuming you have some background in algebra (even O-Level/GCSE would probably be enough), if you sat down and took your time, thinking carefully, going through it 'step by step' (i.e. pausing at each equals sign), you would probably be able to get to grips with it (if you really wanted to ).Im lost for words john, never seen anything like it Closest i got to that was when i took my city and quilds "C" course, nowadays would not know where to start
Kind Regards, John