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Theorem 7p3e10 9684
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 9202 . . . 4 3 = (2 + 1)
21oveq2i 6028 . . 3 (7 + 3) = (7 + (2 + 1))
3 7cn 9226 . . . 4 7 ∈ ℂ
4 2cn 9213 . . . 4 2 ∈ ℂ
5 ax-1cn 8124 . . . 4 1 ∈ ℂ
63, 4, 5addassi 8186 . . 3 ((7 + 2) + 1) = (7 + (2 + 1))
72, 6eqtr4i 2255 . 2 (7 + 3) = ((7 + 2) + 1)
8 7p2e9 9294 . . 3 (7 + 2) = 9
98oveq1i 6027 . 2 ((7 + 2) + 1) = (9 + 1)
10 9p1e10 9612 . 2 (9 + 1) = 10
117, 9, 103eqtri 2256 1 (7 + 3) = 10
Colors of variables: wff set class
Syntax hints:   = wceq 1397  (class class class)co 6017  0cc0 8031  1c1 8032   + caddc 8034  2c2 9193  3c3 9194  7c7 9198  9c9 9200  cdc 9610
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213  ax-sep 4207  ax-cnex 8122  ax-resscn 8123  ax-1cn 8124  ax-1re 8125  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-mulcom 8132  ax-addass 8133  ax-mulass 8134  ax-distr 8135  ax-1rid 8138  ax-0id 8139  ax-cnre 8142
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-iota 5286  df-fv 5334  df-ov 6020  df-inn 9143  df-2 9201  df-3 9202  df-4 9203  df-5 9204  df-6 9205  df-7 9206  df-8 9207  df-9 9208  df-dec 9611
This theorem is referenced by:  7p4e11  9685
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