SV #5: Unit J Concepts 3-4 - Solving Three-Variable Systems

 The viewer must pay attention to interchanging (arranging) the system before using the boxes to find the "zero triangle" and the "stair-step one line", which would make the process of solving the matrix easier. They also need to pay close attention to multiplying a row by a constant and adding/subtracting it to another row correctly, otherwise it could mess up the whole matrix. The view must know when solving, row 3 goes with row 2, and row 2 goes with row 1.