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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 12209 | . . . 4 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7369 | . . 3 ⊢ (6 + 3) = (6 + (2 + 1)) |
| 3 | 6cn 12236 | . . . 4 ⊢ 6 ∈ ℂ | |
| 4 | 2cn 12220 | . . . 4 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11084 | . . . 4 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | addassi 11142 | . . 3 ⊢ ((6 + 2) + 1) = (6 + (2 + 1)) |
| 7 | 2, 6 | eqtr4i 2762 | . 2 ⊢ (6 + 3) = ((6 + 2) + 1) |
| 8 | df-9 12215 | . . 3 ⊢ 9 = (8 + 1) | |
| 9 | 6p2e8 12299 | . . . 4 ⊢ (6 + 2) = 8 | |
| 10 | 9 | oveq1i 7368 | . . 3 ⊢ ((6 + 2) + 1) = (8 + 1) |
| 11 | 8, 10 | eqtr4i 2762 | . 2 ⊢ 9 = ((6 + 2) + 1) |
| 12 | 7, 11 | eqtr4i 2762 | 1 ⊢ (6 + 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 (class class class)co 7358 1c1 11027 + caddc 11029 2c2 12200 3c3 12201 6c6 12204 8c8 12206 9c9 12207 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-1cn 11084 ax-addcl 11086 ax-addass 11091 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-iota 6448 df-fv 6500 df-ov 7361 df-2 12208 df-3 12209 df-4 12210 df-5 12211 df-6 12212 df-7 12213 df-8 12214 df-9 12215 |
| This theorem is referenced by: 3t3e9 12307 6p4e10 12679 2exp8 17016 139prm 17051 2503lem2 17065 4001lem1 17068 4001lem2 17069 4001lem4 17071 log2ublem3 26914 ex-gcd 30532 hgt750lem2 34809 kur14lem8 35407 problem5 35863 fmtno5lem1 47799 139prmALT 47842 gboge9 48010 gbpart9 48015 nnsum4primeseven 48046 |
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