Theorem: MyRing.one_add_one_eq_two (LeanCourse/MIL/C02_Basics/solutions/Solutions_S02_Proving_Identities_in_Algebraic_Structures.lean)

State before:
R : Type u_1
inst✝ : Ring R
⊢ 1 + 1 = 2
Tactic:
norm_num
State after:
no goals