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Theorem 1p2e3 9173
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 9109 . 2  |-  2  e.  CC
2 ax-1cn 8020 . 2  |-  1  e.  CC
3 2p1e3 9172 . 2  |-  ( 2  +  1 )  =  3
41, 2, 3addcomli 8219 1  |-  ( 1  +  2 )  =  3
Colors of variables: wff set class
Syntax hints:    = wceq 1373  (class class class)co 5946   1c1 7928    + caddc 7930   2c2 9089   3c3 9090
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-11 1529  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-ext 2187  ax-resscn 8019  ax-1cn 8020  ax-1re 8021  ax-addrcl 8024  ax-addcom 8027
This theorem depends on definitions:  df-bi 117  df-nf 1484  df-sb 1786  df-clab 2192  df-cleq 2198  df-clel 2201  df-in 3172  df-ss 3179  df-2 9097  df-3 9098
This theorem is referenced by:  binom3  10804  3lcm2e6woprm  12441  2exp16  12793  1kp2ke3k  15697
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