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Theorem 3p3e6 9426
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 9343 . . . 4 3 = (2 + 1)
21oveq2i 6086 . . 3 (3 + 3) = (3 + (2 + 1))
3 3cn 9358 . . . 4 3 ∈ ℂ
4 2cn 9354 . . . 4 2 ∈ ℂ
5 ax-1cn 8262 . . . 4 1 ∈ ℂ
63, 4, 5addassi 8324 . . 3 ((3 + 2) + 1) = (3 + (2 + 1))
72, 6eqtr4i 2262 . 2 (3 + 3) = ((3 + 2) + 1)
8 df-6 9346 . . 3 6 = (5 + 1)
9 3p2e5 9425 . . . 4 (3 + 2) = 5
109oveq1i 6085 . . 3 ((3 + 2) + 1) = (5 + 1)
118, 10eqtr4i 2262 . 2 6 = ((3 + 2) + 1)
127, 11eqtr4i 2262 1 (3 + 3) = 6
Colors of variables: wff set class
Syntax hints:   = wceq 1402  (class class class)co 6075  1c1 8170   + caddc 8172  2c2 9334  3c3 9335  5c5 9337  6c6 9338
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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-addrcl 8266  ax-addass 8271
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-br 4126  df-iota 5332  df-fv 5380  df-ov 6078  df-2 9342  df-3 9343  df-4 9344  df-5 9345  df-6 9346
This theorem is referenced by:  3t2e6  9440  binom4  16004  ex-dvds  16658  ex-gcd  16659
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