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Theorem 3p3e6 9397
Description: 3 + 3 = 6. (Contributed by NM, 11-May-2004.)
Assertion
Ref Expression
3p3e6 (3 + 3) = 6

Proof of Theorem 3p3e6
StepHypRef Expression
1 df-3 9314 . . . 4 3 = (2 + 1)
21oveq2i 6069 . . 3 (3 + 3) = (3 + (2 + 1))
3 3cn 9329 . . . 4 3 ∈ ℂ
4 2cn 9325 . . . 4 2 ∈ ℂ
5 ax-1cn 8236 . . . 4 1 ∈ ℂ
63, 4, 5addassi 8298 . . 3 ((3 + 2) + 1) = (3 + (2 + 1))
72, 6eqtr4i 2258 . 2 (3 + 3) = ((3 + 2) + 1)
8 df-6 9317 . . 3 6 = (5 + 1)
9 3p2e5 9396 . . . 4 (3 + 2) = 5
109oveq1i 6068 . . 3 ((3 + 2) + 1) = (5 + 1)
118, 10eqtr4i 2258 . 2 6 = ((3 + 2) + 1)
127, 11eqtr4i 2258 1 (3 + 3) = 6
Colors of variables: wff set class
Syntax hints:   = wceq 1398  (class class class)co 6058  1c1 8144   + caddc 8146  2c2 9305  3c3 9306  5c5 9308  6c6 9309
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216  ax-resscn 8235  ax-1cn 8236  ax-1re 8237  ax-addrcl 8240  ax-addass 8245
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-rex 2528  df-v 2817  df-un 3218  df-in 3220  df-ss 3227  df-sn 3700  df-pr 3701  df-op 3703  df-uni 3920  df-br 4115  df-iota 5317  df-fv 5365  df-ov 6061  df-2 9313  df-3 9314  df-4 9315  df-5 9316  df-6 9317
This theorem is referenced by:  3t2e6  9411  binom4  15970  ex-dvds  16624  ex-gcd  16625
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