Cramer’s Rule : A Proof / Justification for a System of 2 Linear Equations, 2 Unknowns

Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! 🙂 https://www.patreon.com/patrickjmt !! Cramer’s Rule : A Proof / Justification for a System of 2 Linear Equations, 2 Unknowns. Here I justify Cramer’s Rule that one encounters in Algebra / Linear Algebra. The same proof would work for larger systems as well.

Questions?