How to solve a linear system symbolically?

[rskibba]

I have the attached linear system.  I want to solve for X1, X2, and X3 symbolically. three equations three unknowns, however the coefficients are unknown. Is this possible in MathCAD?

[MJG]

Here's one way to solve:

However, I'm guessing you wanted a solution other than X1=X2=X3=0

[rskibba]

Thank you for your solution. yes, I am wanting to get X1, X2, xnad X3 in terms of a...f.  It can be solved by hand as a simultaneous equation.  It is tedious.

[MJG]

Have you solved this one by hand?  If so, can you share?

[-MFra- · Accepted solution]

...something is missing...

namely, the vector of known terms B.

[rskibba]

Your solution just popped up. Yes, this is what I am looking for?  Can B be all zeros?

[MJG]

Can B be all zeros?

Yes, but then you end up with the solution X1=X2=X3=0

[rskibba]

Agreed

[-MFra-]

The worksheet

[ValeryOchkov]