00:03
All right, for this problem, we want to use kramer's rule.
00:06
We want to identify d because if d equals zero, then we've got to find another way to do this problem.
00:14
So d for us, our determinant is a minus b.
00:19
So unless those are the same number, then that's what we are going to use.
00:26
D sub x, we have b over a times 1, minus b times 1 over b, which is 1.
00:35
So our x value is going to equal b over a minus 1 over a minus b.
00:51
So if we want to simplify this, we will take b over a minus b minus 1, minus 1 over a minus b...