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How to solve a linear system symbolically?

rskibba
2-Guest

How to solve a linear system symbolically?

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?

1 ACCEPTED SOLUTION

Accepted Solutions
-MFra-
21-Topaz I
(To:rskibba)

...something is missing...

namely, the vector of known terms B.

sys1.jpg

View solution in original post

9 REPLIES 9
MJG
18-Opal
18-Opal
(To:rskibba)

Here's one way to solve:

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

rskibba
2-Guest
(To:MJG)

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
18-Opal
18-Opal
(To:rskibba)

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

-MFra-
21-Topaz I
(To:rskibba)

...something is missing...

namely, the vector of known terms B.

sys1.jpg

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

MJG
18-Opal
18-Opal
(To:rskibba)

Can B be all zeros?

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

rskibba
2-Guest
(To:MJG)

Agreed

-MFra-
21-Topaz I
(To:-MFra-)

The worksheet

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