Theorem oveqi

Description: Equality inference for operation value. (Contributed by NM, 24-Nov-2007)

	Ref	Expression
Hypothesis	oveq1i.1	$$⊢A=B$$
Assertion	oveqi	$$⊢CAD=CBD$$

Proof

Step	Hyp	Ref	Expression
1		oveq1i.1	$$⊢A=B$$
2		oveq	$$⊢A=B\to CAD=CBD$$
3	1 2	ax-mp	$$⊢CAD=CBD$$