Sistemi di Equazioni Lineari

Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2xQ/ Esercizi: http://www.khanacademy.org/exercises?exid=systems_of_equations Traduzione in Italiano del video systems of equations http://www.youtube.com/watch?v=nok99JOhcjo http://www.khanacademy.org/video/systems-of-equations?playlist=Algebra Help us caption & translate this video! http://amara.org/v/B2xQ/