**What is a system of equations? **It is a collection of two or more equations with the same solution (common point) to both equations. The solution to a system of equations is the common solution (common point) to both equations.

**When do we use a system of equations? **Typically, it used when there is more than one unknown quantity and you want a specific amount for each quantity.

**3.3.1 Introduction to a system of equation: **