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| Mirrors > Home > ILE Home > Th. List > 5p2e7 | GIF version | ||
| Description: 5 + 2 = 7. (Contributed by NM, 11-May-2004.) |
| Ref | Expression |
|---|---|
| 5p2e7 | ⊢ (5 + 2) = 7 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-2 9165 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 6011 | . . . 4 ⊢ (5 + 2) = (5 + (1 + 1)) |
| 3 | 5cn 9186 | . . . . 5 ⊢ 5 ∈ ℂ | |
| 4 | ax-1cn 8088 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 8150 | . . . 4 ⊢ ((5 + 1) + 1) = (5 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2253 | . . 3 ⊢ (5 + 2) = ((5 + 1) + 1) |
| 7 | df-6 9169 | . . . 4 ⊢ 6 = (5 + 1) | |
| 8 | 7 | oveq1i 6010 | . . 3 ⊢ (6 + 1) = ((5 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2253 | . 2 ⊢ (5 + 2) = (6 + 1) |
| 10 | df-7 9170 | . 2 ⊢ 7 = (6 + 1) | |
| 11 | 9, 10 | eqtr4i 2253 | 1 ⊢ (5 + 2) = 7 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1395 (class class class)co 6000 1c1 7996 + caddc 7998 2c2 9157 5c5 9160 6c6 9161 7c7 9162 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-resscn 8087 ax-1cn 8088 ax-1re 8089 ax-addrcl 8092 ax-addass 8097 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-rex 2514 df-v 2801 df-un 3201 df-in 3203 df-ss 3210 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3888 df-br 4083 df-iota 5277 df-fv 5325 df-ov 6003 df-2 9165 df-3 9166 df-4 9167 df-5 9168 df-6 9169 df-7 9170 |
| This theorem is referenced by: 5p3e8 9254 |
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