Equazioni Lineari Livello 4

Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2xB/ Esercizi: http://www.khanacademy.org/exercises?exid=linear_equations_4 Traduzione in Italiano del video Algebra: Linear Equations 4 http://www.youtube.com/watch?v=9IUEk9fn2Vs http://www.khanacademy.org/video/algebra--linear-equations-4?playlist=Algebra