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Theorem 2p1e3 8116
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 8050 . 2 3 = (2 + 1)
21eqcomi 2060 1 (2 + 1) = 3
Colors of variables: wff set class
Syntax hints:   = wceq 1259  (class class class)co 5540  1c1 6948   + caddc 6950  2c2 8040  3c3 8041
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 103  ax-ia2 104  ax-ia3 105  ax-5 1352  ax-gen 1354  ax-ext 2038
This theorem depends on definitions:  df-bi 114  df-cleq 2049  df-3 8050
This theorem is referenced by:  1p2e3  8117  cnm2m1cnm3  8233  6t5e30  8533  7t5e35  8538  8t4e32  8543  9t4e36  8550  decbin3  8568  m1modge3gt1  9321  fac3  9600  nn0o1gt2  10217  flodddiv4  10246
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