That's exaclty what I made, used the symbolic engine, makes eveything much easier without the need to implement undesirable workarounds. Now evething works as expected.
@GregLocock
I'm a student, take it easy, I'm not a MathCAD expert or know how it makes arithmetic calculations internally, I understand that computers solve this kind of calculation in a different way we make by hand.
I'm not solving matrices alone in MathCAD, that matrix I used as an...