Theorem nfeq2

Description: Hypothesis builder for equality, special case. (Contributed by Mario Carneiro, 10-Oct-2016)

	Ref	Expression
Hypothesis	nfeq2.1	$$⊢\underset{\_}{Ⅎ}xB$$
Assertion	nfeq2	$$⊢ℲxA=B$$

Proof

Step	Hyp	Ref	Expression
1		nfeq2.1	$$⊢\underset{\_}{Ⅎ}xB$$
2		nfcv	$$⊢\underset{\_}{Ⅎ}xA$$
3	2 1	nfeq	$$⊢ℲxA=B$$