Goats =======> 13
Geese ======> 17
So, 17 Geese * 2 Legs each ========> 34 Legs
13 Goats * 4 Legs each ========> 52 Legs
52 + 34 ======> 86
17 Geese * 2 eyes each ==========> 26 eyes
13 Goats * 2 eyes each =========> 34 eyes
34 + 26 ===========> 60
The solution is that Farmer Jensen has, 17 Geese, and 13 Goats.
Hope that helps!!! : )