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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 9202 | . . . 4 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 6028 | . . 3 ⊢ (7 + 3) = (7 + (2 + 1)) |
| 3 | 7cn 9226 | . . . 4 ⊢ 7 ∈ ℂ | |
| 4 | 2cn 9213 | . . . 4 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 8124 | . . . 4 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | addassi 8186 | . . 3 ⊢ ((7 + 2) + 1) = (7 + (2 + 1)) |
| 7 | 2, 6 | eqtr4i 2255 | . 2 ⊢ (7 + 3) = ((7 + 2) + 1) |
| 8 | 7p2e9 9294 | . . 3 ⊢ (7 + 2) = 9 | |
| 9 | 8 | oveq1i 6027 | . 2 ⊢ ((7 + 2) + 1) = (9 + 1) |
| 10 | 9p1e10 9612 | . 2 ⊢ (9 + 1) = ;10 | |
| 11 | 7, 9, 10 | 3eqtri 2256 | 1 ⊢ (7 + 3) = ;10 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1397 (class class class)co 6017 0cc0 8031 1c1 8032 + caddc 8034 2c2 9193 3c3 9194 7c7 9198 9c9 9200 ;cdc 9610 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 ax-sep 4207 ax-cnex 8122 ax-resscn 8123 ax-1cn 8124 ax-1re 8125 ax-icn 8126 ax-addcl 8127 ax-addrcl 8128 ax-mulcl 8129 ax-mulcom 8132 ax-addass 8133 ax-mulass 8134 ax-distr 8135 ax-1rid 8138 ax-0id 8139 ax-cnre 8142 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-iota 5286 df-fv 5334 df-ov 6020 df-inn 9143 df-2 9201 df-3 9202 df-4 9203 df-5 9204 df-6 9205 df-7 9206 df-8 9207 df-9 9208 df-dec 9611 |
| This theorem is referenced by: 7p4e11 9685 |
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