00:01
We end up the augmented matrix, 3, 4, 7, and 2, with the augmented comma 011.
00:14
Let's choose the first row as our pivot row, so let's divide out by 3, we'll end up with 1 5 over 3, and then 0.
00:29
Multiply it by 4, and subtract it from row 2.
00:35
With this, you multiply it by 7 and subtract it from row 3.
00:49
Notice on our next step, this will be used to cancel out of the bottom row and we add it to extract it from it.
00:58
So we'll add 0 0 0.
01:03
And then let's get rid of this top entry 2.
01:06
So let's see.
01:10
Let's multiply this row 2 by negative 5 over 3.
01:20
Let's just multiply it at scale it first...