linarith
α : Type u_1
inst✝ : Preorder α
dec : DecidableEq α
M N P Q : Multiset α
h : M + N = P + Q
x : α
H0 : Multiset.count x M + Multiset.count x N = Multiset.count x P + Multiset.count x Q
l_u : Multiset.count x P < Multiset.count x M
⊢ Multiset.count x N ≤ Multiset.count x Q
no goals