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| Mirrors > Home > MPE Home > Th. List > 6p3e9 | Structured version Visualization version GIF version | ||
| Description: 6 + 3 = 9. (Contributed by NM, 11-May-2004.) |
| Ref | Expression |
|---|---|
| 6p3e9 | ⊢ (6 + 3) = 9 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3 12236 | . . . 4 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7371 | . . 3 ⊢ (6 + 3) = (6 + (2 + 1)) |
| 3 | 6cn 12263 | . . . 4 ⊢ 6 ∈ ℂ | |
| 4 | 2cn 12247 | . . . 4 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11087 | . . . 4 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | addassi 11146 | . . 3 ⊢ ((6 + 2) + 1) = (6 + (2 + 1)) |
| 7 | 2, 6 | eqtr4i 2763 | . 2 ⊢ (6 + 3) = ((6 + 2) + 1) |
| 8 | df-9 12242 | . . 3 ⊢ 9 = (8 + 1) | |
| 9 | 6p2e8 12326 | . . . 4 ⊢ (6 + 2) = 8 | |
| 10 | 9 | oveq1i 7370 | . . 3 ⊢ ((6 + 2) + 1) = (8 + 1) |
| 11 | 8, 10 | eqtr4i 2763 | . 2 ⊢ 9 = ((6 + 2) + 1) |
| 12 | 7, 11 | eqtr4i 2763 | 1 ⊢ (6 + 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 (class class class)co 7360 1c1 11030 + caddc 11032 2c2 12227 3c3 12228 6c6 12231 8c8 12233 9c9 12234 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-1cn 11087 ax-addcl 11089 ax-addass 11094 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-iota 6448 df-fv 6500 df-ov 7363 df-2 12235 df-3 12236 df-4 12237 df-5 12238 df-6 12239 df-7 12240 df-8 12241 df-9 12242 |
| This theorem is referenced by: 3t3e9 12334 6p4e10 12707 2exp8 17050 139prm 17085 2503lem2 17099 4001lem1 17102 4001lem2 17103 4001lem4 17105 log2ublem3 26925 ex-gcd 30542 hgt750lem2 34812 kur14lem8 35411 problem5 35867 fmtno5lem1 48028 139prmALT 48071 gboge9 48252 gbpart9 48257 nnsum4primeseven 48288 |
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