Solve a System of Linear Equations Algebraically

Graphing

Substitution

Elimination

Calculator

This is the method we will mostly use.

We get one variable by itself and then we SUBSTITUTE it's value into another equation with matching variables.

It is much easier to understand with a visual representation.

Elimination can be the easiest way to solve systems.

The problem is that you must have the two equations in the exact same form.

This takes a bit of time to get the hang of, but once you do it can be so very easy to solve.

You still need to substitute at the end, so it doesn't save that step.

For multiple choice questions you can just type into the calculator.

It will give you the answer, but obviously not the correct work.

You can use this to check your work though!

Let's look at an example with the calculator.

https://youtu.be/ZxdiJmJ8eJw