Theorem addid2d

Description: 0 is a left identity for addition. (Contributed by Mario Carneiro, 27-May-2016)

	Ref	Expression
Hypothesis	muld.1	|- ( ph -> A e. CC )
Assertion	addid2d	|- ( ph -> ( 0 + A ) = A )

Proof

Step	Hyp	Ref	Expression
1		muld.1	|- ( ph -> A e. CC )
2		addid2	|- ( A e. CC -> ( 0 + A ) = A )
3	1 2	syl	|- ( ph -> ( 0 + A ) = A )