I'm wondering how would I use the Casio FX-CG50 to graph the above?
In its Graph App, it seems I must have "Y" on one side. So, in this case, I can rewrite the above as 2 lines:
(X+Y) = 2 and -(X+Y) = 2. And put "Y" by itself.
However, I'm wondering if there is a way to enter the equation as written.