I have a cubic equation that I need to find a real solution to, does anyone have any ideas??

The equation is ((A/B)-1)*(((A/C)^2)-1)=2*(A/C)*((D*E)/F)

where -1 is actually -1 and not the inverse. All values are known except for that of A, this is the value that I need to find.

Cheers,

Ben