« It Kan zijn not certain just what the terms al-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 ofwel subtracted terms to the other https://www.openlearning.com/u/mouritsendejesus-sx1c6h/about/