Maybe you'd like to post a Mathcad sheet with a manually constructed example to show what you are asking for and how you think the result should look.
Generally spoken - if B and C should change, when A changes, then B and C would be functions dependend on A.
If there is just one equation with A, B and C, you would have to change/give two values to be able to calculate the third.
One main question is: How would/should B and C change with respect to A, and how A and B with respect to C, etc.
I am not sure what table or tables you would like to see at the end.