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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 12329 | . . . 4 ⊢ 4 = (3 + 1) | |
| 2 | 1 | oveq2i 7424 | . . 3 ⊢ (5 + 4) = (5 + (3 + 1)) |
| 3 | 5cn 12353 | . . . 4 ⊢ 5 ∈ ℂ | |
| 4 | 3cn 12346 | . . . 4 ⊢ 3 ∈ ℂ | |
| 5 | ax-1cn 11182 | . . . 4 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | addassi 11243 | . . 3 ⊢ ((5 + 3) + 1) = (5 + (3 + 1)) |
| 7 | 2, 6 | eqtr4i 2786 | . 2 ⊢ (5 + 4) = ((5 + 3) + 1) |
| 8 | df-9 12334 | . . 3 ⊢ 9 = (8 + 1) | |
| 9 | 5p3e8 12421 | . . . 4 ⊢ (5 + 3) = 8 | |
| 10 | 9 | oveq1i 7423 | . . 3 ⊢ ((5 + 3) + 1) = (8 + 1) |
| 11 | 8, 10 | eqtr4i 2786 | . 2 ⊢ 9 = ((5 + 3) + 1) |
| 12 | 7, 11 | eqtr4i 2786 | 1 ⊢ (5 + 4) = 9 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7413 1c1 11125 + caddc 11127 3c3 12320 4c4 12321 5c5 12322 8c8 12325 9c9 12326 |
| 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 2732 ax-1cn 11182 ax-addcl 11184 ax-addass 11189 |
| 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 2739 df-cleq 2752 df-clel 2835 df-rab 3413 df-v 3452 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 6489 df-fv 6541 df-ov 7416 df-2 12327 df-3 12328 df-4 12329 df-5 12330 df-6 12331 df-7 12332 df-8 12333 df-9 12334 |
| This theorem is used by: 5p5e10 12812 139prm 17216 1259lem3 17225 1259lem4 17226 2503lem2 17230 4001lem1 17233 4001lem2 17234 hgt750lem2 35160 problem1 36244 problem2 36245 resqrtvalex 44485 imsqrtvalex 44486 inductionexd 44995 139prmALT 48499 |
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