Introduction to systems of equations
A system of equations is a collection of two or more equations that contains the same variables.
This is a system of two equations with two variables:
In solving a system of equations, we try to find values for each of the unknowns that will satisfy every equation in the system.
x=1, y=1 are solutions of the system
Let's see: 3·1+1=4 and 2·1-3·1=-1.
They satisfy both equations in the system.
There are four methods to solving systems of equations: graphing, substitution, elimination and matrices.