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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 12328 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7425 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12357 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11183 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11244 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2786 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12333 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7424 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2786 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12334 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2786 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7414 1c1 11126 + caddc 11128 2c2 12320 6c6 12324 7c7 12325 8c8 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 11183 ax-addcl 11185 ax-addass 11190 |
| 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 7417 df-2 12328 df-3 12329 df-4 12330 df-5 12331 df-6 12332 df-7 12333 df-8 12334 |
| This theorem is used by: 6p3e9 12425 6t3e18 12847 83prm 17216 1259lem2 17225 1259lem5 17228 2503lem2 17231 2503lem3 17232 4001lem1 17234 log2ub 27187 hgt750lem2 35161 3exp7 42920 4p4e8ALT 43126 3cubeslem3l 43532 resqrtvalex 44486 imsqrtvalex 44487 lhe4.4ex1a 45154 sin5tlem5 47742 fmtno5faclem3 48485 |
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