Use Matrices to Represent Systems of Linear Equations - Expii

Learn how to represent a system of linear equations using either an augmented matrix or a matrix-vector equation of the form AX = B, where A is an n-by-n matrix of coefficients, B is an n-by-1 column vector of constants, and X is an n-by-1 column vector of variables (here n is the number of variables in the system).