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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 12211 | . . . 4 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7364 | . . 3 ⊢ (6 + 3) = (6 + (2 + 1)) |
| 3 | 6cn 12238 | . . . 4 ⊢ 6 ∈ ℂ | |
| 4 | 2cn 12222 | . . . 4 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11086 | . . . 4 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | addassi 11144 | . . 3 ⊢ ((6 + 2) + 1) = (6 + (2 + 1)) |
| 7 | 2, 6 | eqtr4i 2755 | . 2 ⊢ (6 + 3) = ((6 + 2) + 1) |
| 8 | df-9 12217 | . . 3 ⊢ 9 = (8 + 1) | |
| 9 | 6p2e8 12301 | . . . 4 ⊢ (6 + 2) = 8 | |
| 10 | 9 | oveq1i 7363 | . . 3 ⊢ ((6 + 2) + 1) = (8 + 1) |
| 11 | 8, 10 | eqtr4i 2755 | . 2 ⊢ 9 = ((6 + 2) + 1) |
| 12 | 7, 11 | eqtr4i 2755 | 1 ⊢ (6 + 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1540 (class class class)co 7353 1c1 11029 + caddc 11031 2c2 12202 3c3 12203 6c6 12206 8c8 12208 9c9 12209 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2701 ax-1cn 11086 ax-addcl 11088 ax-addass 11093 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-sb 2066 df-clab 2708 df-cleq 2721 df-clel 2803 df-rab 3397 df-v 3440 df-dif 3908 df-un 3910 df-ss 3922 df-nul 4287 df-if 4479 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4862 df-br 5096 df-iota 6442 df-fv 6494 df-ov 7356 df-2 12210 df-3 12211 df-4 12212 df-5 12213 df-6 12214 df-7 12215 df-8 12216 df-9 12217 |
| This theorem is referenced by: 3t3e9 12309 6p4e10 12682 2exp8 17019 139prm 17054 2503lem2 17068 4001lem1 17071 4001lem2 17072 4001lem4 17074 log2ublem3 26875 ex-gcd 30420 hgt750lem2 34639 kur14lem8 35205 problem5 35661 fmtno5lem1 47557 139prmALT 47600 gboge9 47768 gbpart9 47773 nnsum4primeseven 47804 |
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