Theorem oveq2d

Description: Equality deduction for operation value. (Contributed by NM, 13-Mar-1995)

	Ref	Expression
Hypothesis	oveq1d.1	$$⊢\phi \to A=B$$
Assertion	oveq2d	$$⊢\phi \to CFA=CFB$$

Proof

Step	Hyp	Ref	Expression
1		oveq1d.1	$$⊢\phi \to A=B$$
2		oveq2	$$⊢A=B\to CFA=CFB$$
3	1 2	syl	$$⊢\phi \to CFA=CFB$$