Theorem ax6evr

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

	Ref	Expression
Assertion	ax6evr	$$⊢\exists xy=x$$

Proof

Step	Hyp	Ref	Expression
1		ax6ev	$$⊢\exists xx=y$$
2		equcomiv	$$⊢x=y\to y=x$$
3	1 2	eximii	$$⊢\exists xy=x$$