Is there any way to create the matrix "K" automatically? And put free expressions in the other matrix called "B"?
This is possible in Mathcad 11.
The possibilities in Mathcad 14, 15 are generally less. Maybe you are lucky in Prime.
Regarding Matrix B: You can create (almost) any matrix with (almost) any filling you like.
However I see no information on Matrix B...
Matrix B comes from free expressions in these equations (it is a right side of equations)
Mathcad can't recognize COEFFS command when equation is with equal sign...
The only way i have any idea is it:
But still no idea to create B matrix. For example B(1)=P/6k, and kk(1) is P/6k-A3 (I can't do "kk(1)+A3" because the value can be another)
So still i have no solution...