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| Mirrors > Home > MPE Home > Th. List > 6p2e8 | Structured version Visualization version GIF version | ||
| Description: 6 + 2 = 8. (Contributed by NM, 11-May-2004.) |
| Ref | Expression |
|---|---|
| 6p2e8 | ⊢ (6 + 2) = 8 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-2 12320 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7430 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12349 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11175 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11236 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2791 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12325 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7429 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2791 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12326 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2791 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7419 1c1 11118 + caddc 11120 2c2 12312 6c6 12316 7c7 12317 8c8 12318 |
| 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 2148 ax-9 2156 ax-ext 2737 ax-1cn 11175 ax-addcl 11177 ax-addass 11182 |
| 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 2744 df-cleq 2757 df-clel 2840 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-iota 6496 df-fv 6548 df-ov 7422 df-2 12320 df-3 12321 df-4 12322 df-5 12323 df-6 12324 df-7 12325 df-8 12326 |
| This theorem is used by: 6p3e9 12417 6t3e18 12839 83prm 17207 1259lem2 17216 1259lem5 17219 2503lem2 17222 2503lem3 17223 4001lem1 17225 log2ub 27167 hgt750lem2 35106 3exp7 42880 3cubeslem3l 43477 resqrtvalex 44431 imsqrtvalex 44432 lhe4.4ex1a 45099 sin5tlem5 47674 fmtno5faclem3 48393 |
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