Solving Systems of Linear Equations by Substitution

Solving Systems of Linear Equations by Substitution

Did you know?

You don't have to graph a linear systems of equations to solve it.

Instead...

We can use our algebra skills to find the x and y parts of the point where the graphs meet...

So...

How do we do this?

Well, I already know that x = -6y

I'm going to use this to solve for y...

Not that I know y = -1, I can use this to solve for x...

Why do you think I used the second equations?