# Equalities and Matrices

This section introduces linear systems of equalities and various ways to solve them.

In the first two lessons linear functions and systems of linear equalities are defined. Graphical and algebraic methods are explored as methods for answering related questions.

In the last three lessons matrices and different ways they can be used to solve systems of equations are introduced. Two ways that are explored are row reduction and matrix inversion.

## Lessons

- Linear Functions
- Systems of Two Equations
- Matrix Algebra
- Using Matrices to Solve Systems of Equations
- Matrix Inversion