By this, then, we shall recognize both what we must subtract from that which has more, and what we must add to that which has less;
Beraz, bigarrenak zati bakar batean gainditzen du erdia, eta erdiak, kenduriko zatia, zati bakar batean gainditzen du. Beraz, zati horren bidez, hain zuzen ere, jakingo dugu gehiago duenari zer kendu behar zaion eta gutxiago duenari zer erantsi behar zaion: