Simple System of Equations not Solving

Forum|Forum|6 years ago
April 15, 2020
4 replies
1879 views

Hello,

I am returning using Mathcad Prime after a hiatus, and I have a simple system of equations to solve for. The system will become more complex with more output variables, but I want to incrementally build into those relationships. Initially, I want to solve for Fact in terms of the other variables. This could clearly be re-arranged algebraically by hand, but I would like Mathcad to do it. However, it will not solve. Any ideas? I have clearly missed something obvious.

Mechanical_Engineering

Best answer by Werner_E

And here is the second approach I mentioned in my reply above, letting do Prime all the necessary steps.

You decide, which variables you don't want to see in the answer and solve for ALL of them (three equations - three variables to solve for):

L

LucMeekes

23-Emerald IV

Theo,

while it's said that a picture can paint a thousand words....

A worksheet helps much more in provising infomation to solve your problem.

Please attach your worksheet.

Luc

W

Werner_E

25-Diamond I

Is there any reason why Prime should not answer with F.act=K.str * delta.act ? 🙂

In case you would like Prime to replace delta.act with v.act*t and then replace v.act with the expression on the RHS of your first equation, you can try to tell Prime to do so using the "substitute" command.

What you show clearly is NOT a system of equations to solve (otherwise you would have to tell Prime to solve for three variables, not just for one)!

L

LucMeekes

23-Emerald IV

Here's an example: