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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 12405 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7431 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12434 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11258 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11319 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2787 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12410 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7430 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2787 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12411 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2787 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7420 1c1 11201 + caddc 11203 2c2 12397 6c6 12401 7c7 12402 8c8 12403 |
| 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 2733 ax-1cn 11258 ax-addcl 11260 ax-addass 11265 |
| 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 2740 df-cleq 2753 df-clel 2836 df-rab 3414 df-v 3453 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 6494 df-fv 6546 df-ov 7423 df-2 12405 df-3 12406 df-4 12407 df-5 12408 df-6 12409 df-7 12410 df-8 12411 |
| This theorem is used by: 6p3e9 12502 6t3e18 12924 83prm 17301 1259lem2 17310 1259lem5 17313 2503lem2 17316 2503lem3 17317 4001lem1 17319 log2ub 27277 hgt750lem2 35281 3exp7 43103 4p4e8ALT 43309 3cubeslem3l 43696 resqrtvalex 44644 imsqrtvalex 44645 lhe4.4ex1a 45312 sin5tlem5 47922 fmtno5faclem3 48665 |
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