Definition of j and i

[Rasmussoe123]

Im trying to define j as i, when doing an equation. Is that possible?
10+i15
but i want to be able to do it as
10+j15
Thanks

[Diego-PB]

If you want to use "j" instead of "i" to represent the imaginary unit, you can do so. In many contexts, "j" is used instead of "i" to avoid confusion with notation. So, your expression would look like this:
10+j15
It's the same as writing 10+15i

But I'm not sure I completely understand your problem, so maybe my answer isn't correct.