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Theorem 3p4e7 43321
Description: 3 + 4 = 7. (Contributed by SN, 24-Aug-2026.)
Assertion
Ref Expression
3p4e7 (3 + 4) = 7

Proof of Theorem 3p4e7
StepHypRef Expression
1 3cn 12424 . . 3 3 ∈ ℂ
2 2cn 12418 . . 3 2 ∈ ℂ
31, 2, 2addassi 11319 . 2 ((3 + 2) + 2) = (3 + (2 + 2))
4 3p2e5 12493 . . . 4 (3 + 2) = 5
54oveq1i 7430 . . 3 ((3 + 2) + 2) = (5 + 2)
6 5p2e7 12498 . . 3 (5 + 2) = 7
75, 6eqtri 2784 . 2 ((3 + 2) + 2) = 7
8 2p2e4 12477 . . 3 (2 + 2) = 4
98oveq2i 7431 . 2 (3 + (2 + 2)) = (3 + 4)
103, 7, 93eqtr3ri 2793 1 (3 + 4) = 7
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   = wceq 1570  (class class class)co 7420   + caddc 11203  2c2 12397  3c3 12398  4c4 12399  5c5 12400  7c7 12402
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2733  ax-1cn 11258  ax-addcl 11260  ax-addass 11265
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2740  df-cleq 2753  df-clel 2836  df-rab 3414  df-v 3453  df-dif 3902  df-un 3904  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-br 5104  df-iota 6494  df-fv 6546  df-ov 7423  df-2 12405  df-3 12406  df-4 12407  df-5 12408  df-6 12409  df-7 12410
This theorem is used by: (None)
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