Theorem: SetTheory.inter_distrib_left (SetTheory/Basic.lean)

State before:
V : Type u_1
inst✝ : Zermelo V
x y z : V
⊢ x ∩ (y ∪ z) = x ∩ y ∪ x ∩ z
Tactic:
ext
State after:
case h
V : Type u_1
inst✝ : Zermelo V
x y z z✝ : V
⊢ z✝ ∈ x ∩ (y ∪ z) ↔ z✝ ∈ x ∩ y ∪ x ∩ z

State before:
case h
V : Type u_1
inst✝ : Zermelo V
x y z z✝ : V
⊢ z✝ ∈ x ∩ (y ∪ z) ↔ z✝ ∈ x ∩ y ∪ x ∩ z
Tactic:
aesop
State after:
no goals