Theorem addid2i

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

	Ref	Expression
Hypothesis	mul.1	$$⊢A\in ℂ$$
Assertion	addid2i	$$⊢0+A=A$$

Proof

Step	Hyp	Ref	Expression
1		mul.1	$$⊢A\in ℂ$$
2		addid2	$$⊢A\in ℂ\to 0+A=A$$
3	1 2	ax-mp	$$⊢0+A=A$$