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Theorem 4p2e6 8054
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 7973 . . . . 5 2 = (1 + 1)
21oveq2i 5523 . . . 4 (4 + 2) = (4 + (1 + 1))
3 4cn 7993 . . . . 5 4 ∈ ℂ
4 ax-1cn 6977 . . . . 5 1 ∈ ℂ
53, 4, 4addassi 7035 . . . 4 ((4 + 1) + 1) = (4 + (1 + 1))
62, 5eqtr4i 2063 . . 3 (4 + 2) = ((4 + 1) + 1)
7 df-5 7976 . . . 4 5 = (4 + 1)
87oveq1i 5522 . . 3 (5 + 1) = ((4 + 1) + 1)
96, 8eqtr4i 2063 . 2 (4 + 2) = (5 + 1)
10 df-6 7977 . 2 6 = (5 + 1)
119, 10eqtr4i 2063 1 (4 + 2) = 6
Colors of variables: wff set class
Syntax hints:   = wceq 1243  (class class class)co 5512  1c1 6890   + caddc 6892  2c2 7964  4c4 7966  5c5 7967  6c6 7968
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-resscn 6976  ax-1cn 6977  ax-1re 6978  ax-addrcl 6981  ax-addass 6986
This theorem depends on definitions:  df-bi 110  df-3an 887  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-rex 2312  df-v 2559  df-un 2922  df-in 2924  df-ss 2931  df-sn 3381  df-pr 3382  df-op 3384  df-uni 3581  df-br 3765  df-iota 4867  df-fv 4910  df-ov 5515  df-2 7973  df-3 7974  df-4 7975  df-5 7976  df-6 7977
This theorem is referenced by:  4p3e7  8055  div4p1lem1div2  8177  4t4e16  8440
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