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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 12445 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 7462 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
| 3 | 6cn 12474 | . . . . 5 ⊢ 6 ∈ ℂ | |
| 4 | ax-1cn 11297 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 11358 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2789 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
| 7 | df-7 12450 | . . . 4 ⊢ 7 = (6 + 1) | |
| 8 | 7 | oveq1i 7461 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2789 | . 2 ⊢ (6 + 2) = (7 + 1) |
| 10 | df-8 12451 | . 2 ⊢ 8 = (7 + 1) | |
| 11 | 9, 10 | eqtr4i 2789 | 1 ⊢ (6 + 2) = 8 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7451 1c1 11240 + caddc 11242 2c2 12437 6c6 12441 7c7 12442 8c8 12443 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-1cn 11297 ax-addcl 11299 ax-addass 11304 |
| 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 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-iota 6520 df-fv 6574 df-ov 7454 df-2 12445 df-3 12446 df-4 12447 df-5 12448 df-6 12449 df-7 12450 df-8 12451 |
| This theorem is used by: 6p3e9 12542 6t3e18 12964 83prm 17345 1259lem2 17354 1259lem5 17357 2503lem2 17360 2503lem3 17361 4001lem1 17363 log2ub 27334 hgt750lem2 35392 3exp7 43369 4p4e8ALT 43575 3cubeslem3l 43962 resqrtvalex 44906 imsqrtvalex 44907 lhe4.4ex1a 45574 sin5tlem5 48196 fmtno5faclem3 48939 |
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