Theorem: LO.FirstOrder.Arith.Model.add_sub_self' (Arithmetization/Basic/PeanoMinus.lean)

State before:
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐏𝐀⁻
a b c : M
⊢ b + a - b = a
Tactic:
simp [add_comm]
State after:
no goals