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Theorem 6p3e9 12275
Description: 6 + 3 = 9. (Contributed by NM, 11-May-2004.)
Assertion
Ref Expression
6p3e9 (6 + 3) = 9

Proof of Theorem 6p3e9
StepHypRef Expression
1 df-3 12184 . . . 4 3 = (2 + 1)
21oveq2i 7352 . . 3 (6 + 3) = (6 + (2 + 1))
3 6cn 12211 . . . 4 6 ∈ ℂ
4 2cn 12195 . . . 4 2 ∈ ℂ
5 ax-1cn 11059 . . . 4 1 ∈ ℂ
63, 4, 5addassi 11117 . . 3 ((6 + 2) + 1) = (6 + (2 + 1))
72, 6eqtr4i 2757 . 2 (6 + 3) = ((6 + 2) + 1)
8 df-9 12190 . . 3 9 = (8 + 1)
9 6p2e8 12274 . . . 4 (6 + 2) = 8
109oveq1i 7351 . . 3 ((6 + 2) + 1) = (8 + 1)
118, 10eqtr4i 2757 . 2 9 = ((6 + 2) + 1)
127, 11eqtr4i 2757 1 (6 + 3) = 9
Colors of variables: wff setvar class
Syntax hints:   = wceq 1541  (class class class)co 7341  1c1 11002   + caddc 11004  2c2 12175  3c3 12176  6c6 12179  8c8 12181  9c9 12182
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-ext 2703  ax-1cn 11059  ax-addcl 11061  ax-addass 11066
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-clab 2710  df-cleq 2723  df-clel 2806  df-rab 3396  df-v 3438  df-dif 3900  df-un 3902  df-ss 3914  df-nul 4279  df-if 4471  df-sn 4572  df-pr 4574  df-op 4578  df-uni 4855  df-br 5087  df-iota 6432  df-fv 6484  df-ov 7344  df-2 12183  df-3 12184  df-4 12185  df-5 12186  df-6 12187  df-7 12188  df-8 12189  df-9 12190
This theorem is referenced by:  3t3e9  12282  6p4e10  12655  2exp8  16995  139prm  17030  2503lem2  17044  4001lem1  17047  4001lem2  17048  4001lem4  17050  log2ublem3  26880  ex-gcd  30429  hgt750lem2  34657  kur14lem8  35249  problem5  35705  fmtno5lem1  47584  139prmALT  47627  gboge9  47795  gbpart9  47800  nnsum4primeseven  47831
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