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Theorem 3p3e6 8174
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 8099 . . . 4  |-  3  =  ( 2  +  1 )
21oveq2i 5543 . . 3  |-  ( 3  +  3 )  =  ( 3  +  ( 2  +  1 ) )
3 3cn 8114 . . . 4  |-  3  e.  CC
4 2cn 8110 . . . 4  |-  2  e.  CC
5 ax-1cn 7069 . . . 4  |-  1  e.  CC
63, 4, 5addassi 7127 . . 3  |-  ( ( 3  +  2 )  +  1 )  =  ( 3  +  ( 2  +  1 ) )
72, 6eqtr4i 2104 . 2  |-  ( 3  +  3 )  =  ( ( 3  +  2 )  +  1 )
8 df-6 8102 . . 3  |-  6  =  ( 5  +  1 )
9 3p2e5 8173 . . . 4  |-  ( 3  +  2 )  =  5
109oveq1i 5542 . . 3  |-  ( ( 3  +  2 )  +  1 )  =  ( 5  +  1 )
118, 10eqtr4i 2104 . 2  |-  6  =  ( ( 3  +  2 )  +  1 )
127, 11eqtr4i 2104 1  |-  ( 3  +  3 )  =  6
Colors of variables: wff set class
Syntax hints:    = wceq 1284  (class class class)co 5532   1c1 6982    + caddc 6984   2c2 8089   3c3 8090   5c5 8092   6c6 8093
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-resscn 7068  ax-1cn 7069  ax-1re 7070  ax-addrcl 7073  ax-addass 7078
This theorem depends on definitions:  df-bi 115  df-3an 921  df-tru 1287  df-nf 1390  df-sb 1686  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-rex 2354  df-v 2603  df-un 2977  df-in 2979  df-ss 2986  df-sn 3404  df-pr 3405  df-op 3407  df-uni 3602  df-br 3786  df-iota 4887  df-fv 4930  df-ov 5535  df-2 8098  df-3 8099  df-4 8100  df-5 8101  df-6 8102
This theorem is referenced by:  3t2e6  8188  ex-dvds  10567  ex-gcd  10568
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