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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 3p4e7 | Structured version Visualization version GIF version | ||
| Description: 3 + 4 = 7. (Contributed by SN, 24-Aug-2026.) |
| Ref | Expression |
|---|---|
| 3p4e7 | ⊢ (3 + 4) = 7 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3cn 12424 | . . 3 ⊢ 3 ∈ ℂ | |
| 2 | 2cn 12418 | . . 3 ⊢ 2 ∈ ℂ | |
| 3 | 1, 2, 2 | addassi 11319 | . 2 ⊢ ((3 + 2) + 2) = (3 + (2 + 2)) |
| 4 | 3p2e5 12493 | . . . 4 ⊢ (3 + 2) = 5 | |
| 5 | 4 | oveq1i 7430 | . . 3 ⊢ ((3 + 2) + 2) = (5 + 2) |
| 6 | 5p2e7 12498 | . . 3 ⊢ (5 + 2) = 7 | |
| 7 | 5, 6 | eqtri 2784 | . 2 ⊢ ((3 + 2) + 2) = 7 |
| 8 | 2p2e4 12477 | . . 3 ⊢ (2 + 2) = 4 | |
| 9 | 8 | oveq2i 7431 | . 2 ⊢ (3 + (2 + 2)) = (3 + 4) |
| 10 | 3, 7, 9 | 3eqtr3ri 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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