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Theorem 2p1e3 8804
Description: 2 + 1 = 3. (Contributed by Mario Carneiro, 18-Apr-2015.)
Assertion
Ref Expression
2p1e3 (2 + 1) = 3

Proof of Theorem 2p1e3
StepHypRef Expression
1 df-3 8737 . 2 3 = (2 + 1)
21eqcomi 2119 1 (2 + 1) = 3
Colors of variables: wff set class
Syntax hints:   = wceq 1314  (class class class)co 5740  1c1 7585   + caddc 7587  2c2 8728  3c3 8729
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 1406  ax-gen 1408  ax-ext 2097
This theorem depends on definitions:  df-bi 116  df-cleq 2108  df-3 8737
This theorem is referenced by:  1p2e3  8805  cnm2m1cnm3  8922  6t5e30  9239  7t5e35  9244  8t4e32  9249  9t4e36  9256  decbin3  9274  m1modge3gt1  10084  fac3  10418  hash3  10499  nn0o1gt2  11498  flodddiv4  11527
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