Theorem: LO.FirstOrder.Arith.Model.two_mul_add_one_div_two (Arithmetization/Basic/IOpen.lean)

State before:
M : Type u_1
inst✝⁶ : Zero M
inst✝⁵ : One M
inst✝⁴ : Add M
inst✝³ : Mul M
inst✝² : LT M
inst✝¹ : M ⊧ₘ* 𝐏𝐀⁻
inst✝ : M ⊧ₘ* 𝐈open
a : M
⊢ (2 * a + 1) / 2 = a
Tactic:
simp [div_mul_add_self', one_lt_two]
State after:
no goals