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Theorem 6p2e8 9063
Description: 6 + 2 = 8. (Contributed by NM, 11-May-2004.)
Assertion
Ref Expression
6p2e8 (6 + 2) = 8

Proof of Theorem 6p2e8
StepHypRef Expression
1 df-2 8973 . . . . 5 2 = (1 + 1)
21oveq2i 5882 . . . 4 (6 + 2) = (6 + (1 + 1))
3 6cn 8996 . . . . 5 6 ∈ ℂ
4 ax-1cn 7900 . . . . 5 1 ∈ ℂ
53, 4, 4addassi 7961 . . . 4 ((6 + 1) + 1) = (6 + (1 + 1))
62, 5eqtr4i 2201 . . 3 (6 + 2) = ((6 + 1) + 1)
7 df-7 8978 . . . 4 7 = (6 + 1)
87oveq1i 5881 . . 3 (7 + 1) = ((6 + 1) + 1)
96, 8eqtr4i 2201 . 2 (6 + 2) = (7 + 1)
10 df-8 8979 . 2 8 = (7 + 1)
119, 10eqtr4i 2201 1 (6 + 2) = 8
Colors of variables: wff set class
Syntax hints:   = wceq 1353  (class class class)co 5871  1c1 7808   + caddc 7810  2c2 8965  6c6 8969  7c7 8970  8c8 8971
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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159  ax-resscn 7899  ax-1cn 7900  ax-1re 7901  ax-addrcl 7904  ax-addass 7909
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-rex 2461  df-v 2739  df-un 3133  df-in 3135  df-ss 3142  df-sn 3598  df-pr 3599  df-op 3601  df-uni 3810  df-br 4003  df-iota 5176  df-fv 5222  df-ov 5874  df-2 8973  df-3 8974  df-4 8975  df-5 8976  df-6 8977  df-7 8978  df-8 8979
This theorem is referenced by:  6p3e9  9064  6t3e18  9483
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