If a, b, c, γ, d, f are constants and x, y are what you’re solving for, then it’s already solved. You’ve already written x and y in terms of the others.
Yes but there is x(a, b, c, γ, d, f, y) and y(a, b, c, γ, d, f, x), so the sistem is not solved. To be solved I need x(a, b, c, γ, d, f ) and y(a, b, c, γ, d, f ).
Oh, nevermind. I didn’t realize that y was in the expression for x and x was in the expression for y. Side note, it would be nice if you used the formatting tools and gave us actual Mathematica code so we could just paste it into a notebook rather than try to inspect the text.