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Theorem 1p2e3 9012
Description: 1 + 2 = 3 (common case). (Contributed by David A. Wheeler, 8-Dec-2018.)
Assertion
Ref Expression
1p2e3  |-  ( 1  +  2 )  =  3

Proof of Theorem 1p2e3
StepHypRef Expression
1 2cn 8949 . 2  |-  2  e.  CC
2 ax-1cn 7867 . 2  |-  1  e.  CC
3 2p1e3 9011 . 2  |-  ( 2  +  1 )  =  3
41, 2, 3addcomli 8064 1  |-  ( 1  +  2 )  =  3
Colors of variables: wff set class
Syntax hints:    = wceq 1348  (class class class)co 5853   1c1 7775    + caddc 7777   2c2 8929   3c3 8930
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-11 1499  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-addrcl 7871  ax-addcom 7874
This theorem depends on definitions:  df-bi 116  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-in 3127  df-ss 3134  df-2 8937  df-3 8938
This theorem is referenced by:  binom3  10593  3lcm2e6woprm  12040  1kp2ke3k  13759
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