The Method of Elimination ( also called reduction ) consists in combining two equations in such a way that one of the variables is eliminated. We can add or subtract two equations or we can multiply the equations by a number and then add or subtract them to cancel one of the variables.
In this video, we do three examples with systems of equations of two variables and two unknowns and two examples with systems of equations with three equations and three unknowns. Some of them end up having a unique solution, some no solution (inconsistent) and some, infinite solutions. Pay attention and learn how to write the infinite number of solutions.