m n a b c d : ℤ
h : a ≡ b [ZMOD n]
⊢ c * a ≡ c * b [ZMOD c * n]
m n a b c d : ℤ
h : a ≡ b [ZMOD n]
⊢ a * c ≡ b * c [ZMOD n * c]
rw [mul_comm a, mul_comm b, mul_comm n]
no goals
m n a b c d : ℤ
h : a ≡ b [ZMOD n]
⊢ c * a ≡ c * b [ZMOD c * n]
exact h.mul_left'