« It Kan zijn not certain just what the terms weet-jabr and muqabalah mean, but the usual interpretation is similar to that implied in the translation above. The word weet-jabr presumably meant something like "restoration" or "completion" and seems to refer to the transposition of subtracted terms to the other https://www.metooo.co.uk/u/6838a0ad61d7d250ca34126d