Theorem: Pos.le_of_add_le_add_right (Extra/Pos/Lemmas.lean)

State before:
x y z : Pos
⊢ x + z ≤ y + z → x ≤ y
Tactic:
by_toNat
State after:
x y z : Pos
⊢ y.toNat + z.toNat ≥ x.toNat + z.toNat → y.toNat ≥ x.toNat

State before:
x y z : Pos
⊢ y.toNat + z.toNat ≥ x.toNat + z.toNat → y.toNat ≥ x.toNat
Tactic:
exact Nat.le_of_add_le_add_right
State after:
no goals