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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 12256 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7401 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12284 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11133 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11191 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2756 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12261 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7400 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2756 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12262 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2756 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1540 (class class class)co 7390 1c1 11076 + caddc 11078 2c2 12248 6c6 12252 7c7 12253 8c8 12254 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2702 ax-1cn 11133 ax-addcl 11135 ax-addass 11140 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-sb 2066 df-clab 2709 df-cleq 2722 df-clel 2804 df-rab 3409 df-v 3452 df-dif 3920 df-un 3922 df-ss 3934 df-nul 4300 df-if 4492 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-br 5111 df-iota 6467 df-fv 6522 df-ov 7393 df-2 12256 df-3 12257 df-4 12258 df-5 12259 df-6 12260 df-7 12261 df-8 12262 |
| This theorem is referenced by: 6p3e9 12348 6t3e18 12761 83prm 17100 1259lem2 17109 1259lem5 17112 2503lem2 17115 2503lem3 17116 4001lem1 17118 log2ub 26866 hgt750lem2 34650 3exp7 42048 3cubeslem3l 42681 resqrtvalex 43641 imsqrtvalex 43642 lhe4.4ex1a 44325 fmtno5faclem3 47586 |
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