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| Mirrors > Home > ILE Home > Th. List > 7p3e10 | GIF version | ||
| Description: 7 + 3 = 10. (Contributed by NM, 5-Feb-2007.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 6-Sep-2021.) |
| Ref | Expression |
|---|---|
| 7p3e10 | ⊢ (7 + 3) = ;10 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3 9245 | . . . 4 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 6039 | . . 3 ⊢ (7 + 3) = (7 + (2 + 1)) |
| 3 | 7cn 9269 | . . . 4 ⊢ 7 ∈ ℂ | |
| 4 | 2cn 9256 | . . . 4 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 8168 | . . . 4 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | addassi 8230 | . . 3 ⊢ ((7 + 2) + 1) = (7 + (2 + 1)) |
| 7 | 2, 6 | eqtr4i 2255 | . 2 ⊢ (7 + 3) = ((7 + 2) + 1) |
| 8 | 7p2e9 9337 | . . 3 ⊢ (7 + 2) = 9 | |
| 9 | 8 | oveq1i 6038 | . 2 ⊢ ((7 + 2) + 1) = (9 + 1) |
| 10 | 9p1e10 9657 | . 2 ⊢ (9 + 1) = ;10 | |
| 11 | 7, 9, 10 | 3eqtri 2256 | 1 ⊢ (7 + 3) = ;10 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6028 0cc0 8075 1c1 8076 + caddc 8078 2c2 9236 3c3 9237 7c7 9241 9c9 9243 ;cdc 9655 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2213 ax-sep 4212 ax-cnex 8166 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-mulcom 8176 ax-addass 8177 ax-mulass 8178 ax-distr 8179 ax-1rid 8182 ax-0id 8183 ax-cnre 8186 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-rab 2520 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-br 4094 df-iota 5293 df-fv 5341 df-ov 6031 df-inn 9186 df-2 9244 df-3 9245 df-4 9246 df-5 9247 df-6 9248 df-7 9249 df-8 9250 df-9 9251 df-dec 9656 |
| This theorem is referenced by: 7p4e11 9730 |
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