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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 12300 | . . . 4 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7419 | . . 3 ⊢ (6 + 3) = (6 + (2 + 1)) |
| 3 | 6cn 12328 | . . . 4 ⊢ 6 ∈ ℂ | |
| 4 | 2cn 12312 | . . . 4 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11154 | . . . 4 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | addassi 11215 | . . 3 ⊢ ((6 + 2) + 1) = (6 + (2 + 1)) |
| 7 | 2, 6 | eqtr4i 2795 | . 2 ⊢ (6 + 3) = ((6 + 2) + 1) |
| 8 | df-9 12306 | . . 3 ⊢ 9 = (8 + 1) | |
| 9 | 6p2e8 12395 | . . . 4 ⊢ (6 + 2) = 8 | |
| 10 | 9 | oveq1i 7418 | . . 3 ⊢ ((6 + 2) + 1) = (8 + 1) |
| 11 | 8, 10 | eqtr4i 2795 | . 2 ⊢ 9 = ((6 + 2) + 1) |
| 12 | 7, 11 | eqtr4i 2795 | 1 ⊢ (6 + 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1567 (class class class)co 7408 1c1 11097 + caddc 11099 2c2 12291 3c3 12292 6c6 12295 8c8 12297 9c9 12298 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-1cn 11154 ax-addcl 11156 ax-addass 11161 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-ss 3930 df-nul 4295 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-br 5111 df-iota 6489 df-fv 6541 df-ov 7411 df-2 12299 df-3 12300 df-4 12301 df-5 12302 df-6 12303 df-7 12304 df-8 12305 df-9 12306 |
| This theorem is referenced by: 3t3e9 12404 6p4e10 12784 2exp8 17144 139prm 17180 2503lem2 17194 4001lem1 17197 4001lem2 17198 4001lem4 17200 log2ublem3 27075 ex-gcd 30745 hgt750lem2 34980 kur14lem8 35600 problem5 36056 fmtno5lem1 48187 139prmALT 48230 gboge9 48411 gbpart9 48416 nnsum4primeseven 48447 |
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