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Metamath Proof Explorer

Theorem 7p1e8

Description: 7 + 1 = 8. (Contributed by Mario Carneiro, 18-Apr-2015)

		Ref	Expression
	Assertion	7p1e8	$⊢ 7 + 1 = 8$

Step	Hyp	Ref	Expression
1		df-8	$⊢ 8 = 7 + 1$
2	1	eqcomi	$⊢ 7 + 1 = 8$