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Theorem 7p3e10 9663
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) = 10

Proof of Theorem 7p3e10
StepHypRef Expression
1 df-3 9181 . . . 4 3 = (2 + 1)
21oveq2i 6018 . . 3 (7 + 3) = (7 + (2 + 1))
3 7cn 9205 . . . 4 7 ∈ ℂ
4 2cn 9192 . . . 4 2 ∈ ℂ
5 ax-1cn 8103 . . . 4 1 ∈ ℂ
63, 4, 5addassi 8165 . . 3 ((7 + 2) + 1) = (7 + (2 + 1))
72, 6eqtr4i 2253 . 2 (7 + 3) = ((7 + 2) + 1)
8 7p2e9 9273 . . 3 (7 + 2) = 9
98oveq1i 6017 . 2 ((7 + 2) + 1) = (9 + 1)
10 9p1e10 9591 . 2 (9 + 1) = 10
117, 9, 103eqtri 2254 1 (7 + 3) = 10
Colors of variables: wff set class
Syntax hints:   = wceq 1395  (class class class)co 6007  0cc0 8010  1c1 8011   + caddc 8013  2c2 9172  3c3 9173  7c7 9177  9c9 9179  cdc 9589
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211  ax-sep 4202  ax-cnex 8101  ax-resscn 8102  ax-1cn 8103  ax-1re 8104  ax-icn 8105  ax-addcl 8106  ax-addrcl 8107  ax-mulcl 8108  ax-mulcom 8111  ax-addass 8112  ax-mulass 8113  ax-distr 8114  ax-1rid 8117  ax-0id 8118  ax-cnre 8121
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-rab 2517  df-v 2801  df-un 3201  df-in 3203  df-ss 3210  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-br 4084  df-iota 5278  df-fv 5326  df-ov 6010  df-inn 9122  df-2 9180  df-3 9181  df-4 9182  df-5 9183  df-6 9184  df-7 9185  df-8 9186  df-9 9187  df-dec 9590
This theorem is referenced by:  7p4e11  9664
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