00:01
Okay, number 12, i'm going to solve the system of linear equations by graphing, and i'm going to use an online graphing calculator to do this.
00:08
You can use it handheld or online.
00:11
So my first equation is x plus y equals 1.
00:16
I already have a line in here that's similar, so i'll change that to x plus y equals 1.
00:20
And then the second equation was negative x plus y equals negative 3.
00:25
So here are my two lines, and i am finding their intersection point, because the solution is the point.
00:32
Point that lies on both of the lines, which would be our intersection.
00:36
So here our intersection is at 2, negative 1, where x value is 2 and our y value is negative 1...