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Theorem 1p2e3 9171
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 9107 . 2 2 ∈ ℂ
2 ax-1cn 8018 . 2 1 ∈ ℂ
3 2p1e3 9170 . 2 (2 + 1) = 3
41, 2, 3addcomli 8217 1 (1 + 2) = 3
Colors of variables: wff set class
Syntax hints:   = wceq 1373  (class class class)co 5944  1c1 7926   + caddc 7928  2c2 9087  3c3 9088
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 8017  ax-1cn 8018  ax-1re 8019  ax-addrcl 8022  ax-addcom 8025
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 9095  df-3 9096
This theorem is referenced by:  binom3  10802  3lcm2e6woprm  12408  2exp16  12760  1kp2ke3k  15660
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