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Theorem 3p3e6 9429
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 9346 . . . 4  |-  3  =  ( 2  +  1 )
21oveq2i 6089 . . 3  |-  ( 3  +  3 )  =  ( 3  +  ( 2  +  1 ) )
3 3cn 9361 . . . 4  |-  3  e.  CC
4 2cn 9357 . . . 4  |-  2  e.  CC
5 ax-1cn 8265 . . . 4  |-  1  e.  CC
63, 4, 5addassi 8327 . . 3  |-  ( ( 3  +  2 )  +  1 )  =  ( 3  +  ( 2  +  1 ) )
72, 6eqtr4i 2262 . 2  |-  ( 3  +  3 )  =  ( ( 3  +  2 )  +  1 )
8 df-6 9349 . . 3  |-  6  =  ( 5  +  1 )
9 3p2e5 9428 . . . 4  |-  ( 3  +  2 )  =  5
109oveq1i 6088 . . 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 6078   1c1 8173    + caddc 8175   2c2 9337   3c3 9338   5c5 9340   6c6 9341
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 8264  ax-1cn 8265  ax-1re 8266  ax-addrcl 8269  ax-addass 8274
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 3714  df-pr 3715  df-op 3717  df-uni 3934  df-br 4129  df-iota 5335  df-fv 5383  df-ov 6081  df-2 9345  df-3 9346  df-4 9347  df-5 9348  df-6 9349
This theorem is referenced by:  3t2e6  9443  binom4  16007  ex-dvds  16661  ex-gcd  16662
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