Readin' Artin "Algebra" section 1.2 "Row Reduction" | Readin' Episode 3

Reading Artin's classic book "Algebra" (link to buy below). This section describes the process for solving a system of linear equations. A special case is when the system of linear equations has a unique solution, in which case the system of linear equations is invertible.

Book: https://www.amazon.com/Algebra-Classic-Classics-Advanced-Mathematics/dp/0134689607/