Theorem addid2i

Description: 0 is a left identity for addition. (Contributed by NM, 3-Jan-2013)

	Ref	Expression
Hypothesis	mul.1	|- A e. CC
Assertion	addid2i	|- ( 0 + A ) = A

Proof

Step	Hyp	Ref	Expression
1		mul.1	|- A e. CC
2		addid2	|- ( A e. CC -> ( 0 + A ) = A )
3	1 2	ax-mp	|- ( 0 + A ) = A