- de 10mn, 1 ere, Cours, English, Mathématiques, Maths de Base, Scolaire, Seconde, Video System of Equations with 2 and 3 Variables 19 March 2014 antoinevillette2013 18 vidéos [youtube http://www.youtube.com/watch?v=videoseries?list=PL83EE9CA331E43A28&w=640&h=360]