Theorem 5p1e6

Description: 5 + 1 = 6. (Contributed by Mario Carneiro, 18-Apr-2015)

	Ref	Expression
Assertion	5p1e6	$$⊢5+1=6$$

Proof

Step	Hyp	Ref	Expression
1		df-6	$$⊢6=5+1$$
2	1	eqcomi	$$⊢5+1=6$$