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Theorem 7p3e10 9525
Description: 7 + 3 = 10. (Contributed by NM, 5-Feb-2007.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 6-Sep-2021.)
Assertion
Ref Expression
7p3e10  |-  ( 7  +  3 )  = ; 1
0

Proof of Theorem 7p3e10
StepHypRef Expression
1 df-3 9044 . . . 4  |-  3  =  ( 2  +  1 )
21oveq2i 5930 . . 3  |-  ( 7  +  3 )  =  ( 7  +  ( 2  +  1 ) )
3 7cn 9068 . . . 4  |-  7  e.  CC
4 2cn 9055 . . . 4  |-  2  e.  CC
5 ax-1cn 7967 . . . 4  |-  1  e.  CC
63, 4, 5addassi 8029 . . 3  |-  ( ( 7  +  2 )  +  1 )  =  ( 7  +  ( 2  +  1 ) )
72, 6eqtr4i 2217 . 2  |-  ( 7  +  3 )  =  ( ( 7  +  2 )  +  1 )
8 7p2e9 9136 . . 3  |-  ( 7  +  2 )  =  9
98oveq1i 5929 . 2  |-  ( ( 7  +  2 )  +  1 )  =  ( 9  +  1 )
10 9p1e10 9453 . 2  |-  ( 9  +  1 )  = ; 1
0
117, 9, 103eqtri 2218 1  |-  ( 7  +  3 )  = ; 1
0
Colors of variables: wff set class
Syntax hints:    = wceq 1364  (class class class)co 5919   0cc0 7874   1c1 7875    + caddc 7877   2c2 9035   3c3 9036   7c7 9040   9c9 9042  ;cdc 9451
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 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2175  ax-sep 4148  ax-cnex 7965  ax-resscn 7966  ax-1cn 7967  ax-1re 7968  ax-icn 7969  ax-addcl 7970  ax-addrcl 7971  ax-mulcl 7972  ax-mulcom 7975  ax-addass 7976  ax-mulass 7977  ax-distr 7978  ax-1rid 7981  ax-0id 7982  ax-cnre 7985
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ral 2477  df-rex 2478  df-rab 2481  df-v 2762  df-un 3158  df-in 3160  df-ss 3167  df-sn 3625  df-pr 3626  df-op 3628  df-uni 3837  df-int 3872  df-br 4031  df-iota 5216  df-fv 5263  df-ov 5922  df-inn 8985  df-2 9043  df-3 9044  df-4 9045  df-5 9046  df-6 9047  df-7 9048  df-8 9049  df-9 9050  df-dec 9452
This theorem is referenced by:  7p4e11  9526
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