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Theorem 5p3e8 9129
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 9042 . . . 4 3 = (2 + 1)
21oveq2i 5929 . . 3 (5 + 3) = (5 + (2 + 1))
3 5cn 9062 . . . 4 5 ∈ ℂ
4 2cn 9053 . . . 4 2 ∈ ℂ
5 ax-1cn 7965 . . . 4 1 ∈ ℂ
63, 4, 5addassi 8027 . . 3 ((5 + 2) + 1) = (5 + (2 + 1))
72, 6eqtr4i 2217 . 2 (5 + 3) = ((5 + 2) + 1)
8 df-8 9047 . . 3 8 = (7 + 1)
9 5p2e7 9128 . . . 4 (5 + 2) = 7
109oveq1i 5928 . . 3 ((5 + 2) + 1) = (7 + 1)
118, 10eqtr4i 2217 . 2 8 = ((5 + 2) + 1)
127, 11eqtr4i 2217 1 (5 + 3) = 8
Colors of variables: wff set class
Syntax hints:   = wceq 1364  (class class class)co 5918  1c1 7873   + caddc 7875  2c2 9033  3c3 9034  5c5 9036  7c7 9038  8c8 9039
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-resscn 7964  ax-1cn 7965  ax-1re 7966  ax-addrcl 7969  ax-addass 7974
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-rex 2478  df-v 2762  df-un 3157  df-in 3159  df-ss 3166  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-br 4030  df-iota 5215  df-fv 5262  df-ov 5921  df-2 9041  df-3 9042  df-4 9043  df-5 9044  df-6 9045  df-7 9046  df-8 9047
This theorem is referenced by:  5p4e9  9130  ef01bndlem  11899  lgsdir2lem1  15144
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