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| Mirrors > Home > MPE Home > Th. List > 5p4e9 | Structured version Visualization version GIF version | ||
| Description: 5 + 4 = 9. (Contributed by NM, 11-May-2004.) |
| Ref | Expression |
|---|---|
| 5p4e9 | ⊢ (5 + 4) = 9 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-4 12420 | . . . 4 ⊢ 4 = (3 + 1) | |
| 2 | 1 | oveq2i 7441 | . . 3 ⊢ (5 + 4) = (5 + (3 + 1)) |
| 3 | 5cn 12444 | . . . 4 ⊢ 5 ∈ ℂ | |
| 4 | 3cn 12437 | . . . 4 ⊢ 3 ∈ ℂ | |
| 5 | ax-1cn 11271 | . . . 4 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | addassi 11332 | . . 3 ⊢ ((5 + 3) + 1) = (5 + (3 + 1)) |
| 7 | 2, 6 | eqtr4i 2789 | . 2 ⊢ (5 + 4) = ((5 + 3) + 1) |
| 8 | df-9 12425 | . . 3 ⊢ 9 = (8 + 1) | |
| 9 | 5p3e8 12512 | . . . 4 ⊢ (5 + 3) = 8 | |
| 10 | 9 | oveq1i 7440 | . . 3 ⊢ ((5 + 3) + 1) = (8 + 1) |
| 11 | 8, 10 | eqtr4i 2789 | . 2 ⊢ 9 = ((5 + 3) + 1) |
| 12 | 7, 11 | eqtr4i 2789 | 1 ⊢ (5 + 4) = 9 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 (class class class)co 7430 1c1 11214 + caddc 11216 3c3 12411 4c4 12412 5c5 12413 8c8 12416 9c9 12417 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-ext 2735 ax-1cn 11271 ax-addcl 11273 ax-addass 11278 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2101 df-clab 2742 df-cleq 2755 df-clel 2839 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-iota 6501 df-fv 6555 df-ov 7433 df-2 12418 df-3 12419 df-4 12420 df-5 12421 df-6 12422 df-7 12423 df-8 12424 df-9 12425 |
| This theorem is used by: 5p5e10 12903 139prm 17317 1259lem3 17326 1259lem4 17327 2503lem2 17331 4001lem1 17334 4001lem2 17335 hgt750lem2 35337 problem1 36554 problem2 36555 resqrtvalex 44788 imsqrtvalex 44789 inductionexd 45298 139prmALT 48823 |
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