00:02
All right, for this problem, we just need to find the value of x in the solution to this system of equations using kramer's rule.
00:13
So using kramer's rule, we can find x as dx over d.
00:19
And so we're going to start by finding d.
00:21
So we're going to set up a matrix for that.
00:24
And we're just going to use the coefficients for x in these two equations.
00:29
We're going to call them a1 and a2, and the coefficients for y.
00:32
We're going to call them b1 and b2.
00:34
So the matrix is going to look like this.
00:38
And then to actually find d, we're going to multiply a1 and b2.
00:43
And then we're going to subtract b1 times a2.
00:47
And so for these values, that's going to be 2 times negative 4 minus 3 times 1.
00:54
2 times negative 4.
00:56
That's just negative 8...