Metamath Proof Explorer


Theorem addass

Description: Alias for ax-addass , for naming consistency with addassi . (Contributed by NM, 10-Mar-2008)

Ref Expression
Assertion addass A B C A + B + C = A + B + C

Proof

Step Hyp Ref Expression
1 ax-addass A B C A + B + C = A + B + C