Theorem nfeq1

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

	Ref	Expression
Hypothesis	nfeq1.1	|- F/_ x A
Assertion	nfeq1	|- F/ x A = B

Proof

Step	Hyp	Ref	Expression
1		nfeq1.1	|- F/_ x A
2		nfcv	|- F/_ x B
3	1 2	nfeq	|- F/ x A = B