no goals
G : Type u_2
P : Type u_1
inst✝ : AddGroup G
T : AddTorsor G P
v₁ v₂ : G
p₁ p₂ : P
⊢ v₁ +ᵥ p₁ = v₂ +ᵥ p₂ ↔ -v₁ + v₂ = p₁ -ᵥ p₂
rw [eq_vadd_iff_vsub_eq, vadd_vsub_assoc, ← add_right_inj (-v₁), neg_add_cancel_left, eq_comm]