So even though I more or less know how to solve a system of linear equations, I still can't help keep getting lost whenever things get more complicated.
For example, I've got this linear system that I can't seem to solve even though the end result is supposed to be rather simple. So, I've got this linear system:
|2x1 + x2 - 5x3 + x4 = 8
|x1 - 3x2 + 0x3 -6x4 = 9
|0x1 + 2x2 - x3 + 2x4 = -5
|x1 + 4x2 -7x3 + 6x4 = 0
And so, using the coefficients, you get this coefficient matrix:
2 1 -5 1 | 8
1 -3 0 -6 | 9
0 2 -1 2 | -5
1 4 -7 6 | 0
Anyone care to help from here on? I've certainly tried, but my level of maths isn't enough to get an answer out of that.