This week on math: Fantastic Systems of Linear Equations and How to Find Them.
The system of a linear equation is when two lines have the same coordinates at one or more points. If two lines have different coordinates and slopes then their system only has one solution, if they have different coordinates but the same slope their system has no solution because they have the same slope so their lines are parallel and will therefore never meet, and if two lines have the same coordinates and the came slope they will have an infinite number of solutions because they are always meeting at every point.
A t chart can be used to find the solution for a system by creating a t chart for each equation in the system, where the x and y value in each one is equal is the solution.