I'm trying to use Mathcad to solve a series of equations. I keep getting the error message 
"This variable is undefined" Any tips?
ACCEPTED SOLUTION
Accepted Solutions
1) You forgot to type multiplication dots when calculating A.t * (....). If you write A.t(...) then A.t is interpreted as function.
2) You have a unit mismatch in your second equation. The first summand has to be multiplied by a length (I had simply multiplied by 1m which sure is not correct)
1) You forgot to type multiplication dots when calculating A.t * (....). If you write A.t(...) then A.t is interpreted as function.
2) You have a unit mismatch in your second equation. The first summand has to be multiplied by a length (I had simply multiplied by 1m which sure is not correct)
It intrigued me that your first solve block worked but the second one didn't. I found two things from Werner's unit balance:
, and- You need to define A_t and A_s the same:
These, along with Werner's fixes . . .
