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Theorem 6p3e9 12371
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 12275 . . . 4 3 = (2 + 1)
21oveq2i 7402 . . 3 (6 + 3) = (6 + (2 + 1))
3 6cn 12303 . . . 4 6 ∈ ℂ
4 2cn 12287 . . . 4 2 ∈ ℂ
5 ax-1cn 11125 . . . 4 1 ∈ ℂ
63, 4, 5addassi 11186 . . 3 ((6 + 2) + 1) = (6 + (2 + 1))
72, 6eqtr4i 2787 . 2 (6 + 3) = ((6 + 2) + 1)
8 df-9 12281 . . 3 9 = (8 + 1)
9 6p2e8 12370 . . . 4 (6 + 2) = 8
109oveq1i 7401 . . 3 ((6 + 2) + 1) = (8 + 1)
118, 10eqtr4i 2787 . 2 9 = ((6 + 2) + 1)
127, 11eqtr4i 2787 1 (6 + 3) = 9
Colors of variables: wff setvar class
Syntax hints:   = wceq 1559  (class class class)co 7391  1c1 11068   + caddc 11070  2c2 12266  3c3 12267  6c6 12270  8c8 12272  9c9 12273
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-ext 2733  ax-1cn 11125  ax-addcl 11127  ax-addass 11132
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-sb 2090  df-clab 2740  df-cleq 2753  df-clel 2836  df-rab 3414  df-v 3455  df-dif 3905  df-un 3907  df-ss 3919  df-nul 4284  df-if 4478  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4863  df-br 5098  df-iota 6472  df-fv 6524  df-ov 7394  df-2 12274  df-3 12275  df-4 12276  df-5 12277  df-6 12278  df-7 12279  df-8 12280  df-9 12281
This theorem is referenced by:  3t3e9  12379  6p4e10  12759  2exp8  17115  139prm  17151  2503lem2  17165  4001lem1  17168  4001lem2  17169  4001lem4  17171  log2ublem3  27001  ex-gcd  30616  hgt750lem2  34907  kur14lem8  35524  problem5  35980  fmtno5lem1  48123  139prmALT  48166  gboge9  48347  gbpart9  48352  nnsum4primeseven  48383
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