Hello,

I have tried to learn how to enter an equation and then rearrange it such that I can isolate each variable on one side of the equation. I need to specify instances in which certain terms are constant coefficients, and others where they are variables (functions).
This is an example:
H=BS+KE+AX+CT+J*F,
where in the simplest case B, K, A, C and J are all constants and the rest are variables of independent functions.
I would like to rearrange the equation to express it in terms of each variable (each of S, E, X, T and F isolated on the LHS), while specifying the constants listed above).
Then, I want to specify a cases where one or all of the constant coefficients as originally specified are no longer constant, but variable.
I am relatively inexperienced with Mathematica, more so for symbolic operations. However, I have read more pages from the Mathematica language documentation than I can keep track of, but nothing, so far, seems to address my goals.
Eventually, I will want to derive expressions for the various partial derivatives for the expressions, but I need the expressions first.
I will appreciate any assistance the community may provide, whether sending me to the relevant documentation or providing an exemplary input line.

Best Regards,
Paul