Theorem 6m1e5

Description: 6 - 1 = 5. (Contributed by AV, 6-Sep-2021)

	Ref	Expression
Assertion	6m1e5	⊢ ( 6 − 1 ) = 5

Proof

Step	Hyp	Ref	Expression
1		5cn	⊢ 5 ∈ ℂ
2		ax-1cn	⊢ 1 ∈ ℂ
3		df-6	⊢ 6 = ( 5 + 1 )
4	1 2 3	mvrraddi	⊢ ( 6 − 1 ) = 5