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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 12299 | . . . 4 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7421 | . . 3 ⊢ (6 + 3) = (6 + (2 + 1)) |
| 3 | 6cn 12327 | . . . 4 ⊢ 6 ∈ ℂ | |
| 4 | 2cn 12311 | . . . 4 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11153 | . . . 4 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | addassi 11214 | . . 3 ⊢ ((6 + 2) + 1) = (6 + (2 + 1)) |
| 7 | 2, 6 | eqtr4i 2789 | . 2 ⊢ (6 + 3) = ((6 + 2) + 1) |
| 8 | df-9 12305 | . . 3 ⊢ 9 = (8 + 1) | |
| 9 | 6p2e8 12394 | . . . 4 ⊢ (6 + 2) = 8 | |
| 10 | 9 | oveq1i 7420 | . . 3 ⊢ ((6 + 2) + 1) = (8 + 1) |
| 11 | 8, 10 | eqtr4i 2789 | . 2 ⊢ 9 = ((6 + 2) + 1) |
| 12 | 7, 11 | eqtr4i 2789 | 1 ⊢ (6 + 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1570 (class class class)co 7410 1c1 11096 + caddc 11098 2c2 12290 3c3 12291 6c6 12294 8c8 12296 9c9 12297 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-1cn 11153 ax-addcl 11155 ax-addass 11160 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-iota 6492 df-fv 6544 df-ov 7413 df-2 12298 df-3 12299 df-4 12300 df-5 12301 df-6 12302 df-7 12303 df-8 12304 df-9 12305 |
| This theorem is referenced by: 3t3e9 12403 6p4e10 12783 2exp8 17143 139prm 17179 2503lem2 17193 4001lem1 17196 4001lem2 17197 4001lem4 17199 log2ublem3 27113 ex-gcd 30808 hgt750lem2 35039 kur14lem8 35705 problem5 36161 fmtno5lem1 48305 139prmALT 48348 gboge9 48529 gbpart9 48534 nnsum4primeseven 48565 |
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