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Theorem 5p3e8 9061
Description: 5 + 3 = 8. (Contributed by NM, 11-May-2004.)
Assertion
Ref Expression
5p3e8 (5 + 3) = 8

Proof of Theorem 5p3e8
StepHypRef Expression
1 df-3 8974 . . . 4 3 = (2 + 1)
21oveq2i 5882 . . 3 (5 + 3) = (5 + (2 + 1))
3 5cn 8994 . . . 4 5 ∈ ℂ
4 2cn 8985 . . . 4 2 ∈ ℂ
5 ax-1cn 7900 . . . 4 1 ∈ ℂ
63, 4, 5addassi 7961 . . 3 ((5 + 2) + 1) = (5 + (2 + 1))
72, 6eqtr4i 2201 . 2 (5 + 3) = ((5 + 2) + 1)
8 df-8 8979 . . 3 8 = (7 + 1)
9 5p2e7 9060 . . . 4 (5 + 2) = 7
109oveq1i 5881 . . 3 ((5 + 2) + 1) = (7 + 1)
118, 10eqtr4i 2201 . 2 8 = ((5 + 2) + 1)
127, 11eqtr4i 2201 1 (5 + 3) = 8
Colors of variables: wff set class
Syntax hints:   = wceq 1353  (class class class)co 5871  1c1 7808   + caddc 7810  2c2 8965  3c3 8966  5c5 8968  7c7 8970  8c8 8971
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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159  ax-resscn 7899  ax-1cn 7900  ax-1re 7901  ax-addrcl 7904  ax-addass 7909
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-rex 2461  df-v 2739  df-un 3133  df-in 3135  df-ss 3142  df-sn 3598  df-pr 3599  df-op 3601  df-uni 3810  df-br 4003  df-iota 5176  df-fv 5222  df-ov 5874  df-2 8973  df-3 8974  df-4 8975  df-5 8976  df-6 8977  df-7 8978  df-8 8979
This theorem is referenced by:  5p4e9  9062  ef01bndlem  11756  lgsdir2lem1  14291
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