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Theorem 4p2e6 9134
Description: 4 + 2 = 6. (Contributed by NM, 11-May-2004.)
Assertion
Ref Expression
4p2e6 (4 + 2) = 6

Proof of Theorem 4p2e6
StepHypRef Expression
1 df-2 9049 . . . . 5 2 = (1 + 1)
21oveq2i 5933 . . . 4 (4 + 2) = (4 + (1 + 1))
3 4cn 9068 . . . . 5 4 ∈ ℂ
4 ax-1cn 7972 . . . . 5 1 ∈ ℂ
53, 4, 4addassi 8034 . . . 4 ((4 + 1) + 1) = (4 + (1 + 1))
62, 5eqtr4i 2220 . . 3 (4 + 2) = ((4 + 1) + 1)
7 df-5 9052 . . . 4 5 = (4 + 1)
87oveq1i 5932 . . 3 (5 + 1) = ((4 + 1) + 1)
96, 8eqtr4i 2220 . 2 (4 + 2) = (5 + 1)
10 df-6 9053 . 2 6 = (5 + 1)
119, 10eqtr4i 2220 1 (4 + 2) = 6
Colors of variables: wff set class
Syntax hints:   = wceq 1364  (class class class)co 5922  1c1 7880   + caddc 7882  2c2 9041  4c4 9043  5c5 9044  6c6 9045
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-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-ext 2178  ax-resscn 7971  ax-1cn 7972  ax-1re 7973  ax-addrcl 7976  ax-addass 7981
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1475  df-sb 1777  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-rex 2481  df-v 2765  df-un 3161  df-in 3163  df-ss 3170  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-br 4034  df-iota 5219  df-fv 5266  df-ov 5925  df-2 9049  df-3 9050  df-4 9051  df-5 9052  df-6 9053
This theorem is referenced by:  4p3e7  9135  div4p1lem1div2  9245  4t4e16  9555  6gcd4e2  12162  2exp16  12606
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