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Theorem 6p2e8 9271
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 9180 . . . . 5 2 = (1 + 1)
21oveq2i 6018 . . . 4 (6 + 2) = (6 + (1 + 1))
3 6cn 9203 . . . . 5 6 ∈ ℂ
4 ax-1cn 8103 . . . . 5 1 ∈ ℂ
53, 4, 4addassi 8165 . . . 4 ((6 + 1) + 1) = (6 + (1 + 1))
62, 5eqtr4i 2253 . . 3 (6 + 2) = ((6 + 1) + 1)
7 df-7 9185 . . . 4 7 = (6 + 1)
87oveq1i 6017 . . 3 (7 + 1) = ((6 + 1) + 1)
96, 8eqtr4i 2253 . 2 (6 + 2) = (7 + 1)
10 df-8 9186 . 2 8 = (7 + 1)
119, 10eqtr4i 2253 1 (6 + 2) = 8
Colors of variables: wff set class
Syntax hints:   = wceq 1395  (class class class)co 6007  1c1 8011   + caddc 8013  2c2 9172  6c6 9176  7c7 9177  8c8 9178
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211  ax-resscn 8102  ax-1cn 8103  ax-1re 8104  ax-addrcl 8107  ax-addass 8112
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-rex 2514  df-v 2801  df-un 3201  df-in 3203  df-ss 3210  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-iota 5278  df-fv 5326  df-ov 6010  df-2 9180  df-3 9181  df-4 9182  df-5 9183  df-6 9184  df-7 9185  df-8 9186
This theorem is referenced by:  6p3e9  9272  6t3e18  9693
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