Theorem ax6evr

Description: A commuted form of ax6ev . (Contributed by BJ, 7-Dec-2020)

	Ref	Expression
Assertion	ax6evr	⊢ ∃ 𝑥 𝑦 = 𝑥

Proof

Step	Hyp	Ref	Expression
1		ax6ev	⊢ ∃ 𝑥 𝑥 = 𝑦
2		equcomiv	⊢ ( 𝑥 = 𝑦 → 𝑦 = 𝑥 )
3	1 2	eximii	⊢ ∃ 𝑥 𝑦 = 𝑥