Unit 7 (2nd ESO): Simultaneous Equations

Video 1: Graphical Solution Of Simultaneous Linear Equations: https://www.youtube.com/watch?v=NPzlCNDEJqA

Video 2: Solving Linear Systems of Equations Using Substitution: https://www.youtube.com/watch?v=cwHR_B9zK7k

Video 3: Solving Systems of Linear Equations Using Elimination: https://www.youtube.com/watch?v=s7S3oJ_0Uvo