no goals
F : Type ?u.212554
α : Type u_1
β : Type ?u.212560
inst✝¹ : LinearOrderedRing α
inst✝ : FloorRing α
z✝ : ℤ
a✝ a : α
z : ℤ
⊢ ⌈a + ↑z⌉ = ⌈a⌉ + z
rw [← neg_inj, neg_add', ← floor_neg, ← floor_neg, neg_add', floor_sub_int]