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Mirrors > Home > ILE Home > Th. List > 3p2e5 | GIF version |
Description: 3 + 2 = 5. (Contributed by NM, 11-May-2004.) |
Ref | Expression |
---|---|
3p2e5 | ⊢ (3 + 2) = 5 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-2 8772 | . . . . 5 ⊢ 2 = (1 + 1) | |
2 | 1 | oveq2i 5778 | . . . 4 ⊢ (3 + 2) = (3 + (1 + 1)) |
3 | 3cn 8788 | . . . . 5 ⊢ 3 ∈ ℂ | |
4 | ax-1cn 7706 | . . . . 5 ⊢ 1 ∈ ℂ | |
5 | 3, 4, 4 | addassi 7767 | . . . 4 ⊢ ((3 + 1) + 1) = (3 + (1 + 1)) |
6 | 2, 5 | eqtr4i 2161 | . . 3 ⊢ (3 + 2) = ((3 + 1) + 1) |
7 | df-4 8774 | . . . 4 ⊢ 4 = (3 + 1) | |
8 | 7 | oveq1i 5777 | . . 3 ⊢ (4 + 1) = ((3 + 1) + 1) |
9 | 6, 8 | eqtr4i 2161 | . 2 ⊢ (3 + 2) = (4 + 1) |
10 | df-5 8775 | . 2 ⊢ 5 = (4 + 1) | |
11 | 9, 10 | eqtr4i 2161 | 1 ⊢ (3 + 2) = 5 |
Colors of variables: wff set class |
Syntax hints: = wceq 1331 (class class class)co 5767 1c1 7614 + caddc 7616 2c2 8764 3c3 8765 4c4 8766 5c5 8767 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-resscn 7705 ax-1cn 7706 ax-1re 7707 ax-addrcl 7710 ax-addass 7715 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-rex 2420 df-v 2683 df-un 3070 df-in 3072 df-ss 3079 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-br 3925 df-iota 5083 df-fv 5126 df-ov 5770 df-2 8772 df-3 8773 df-4 8774 df-5 8775 |
This theorem is referenced by: 3p3e6 8855 |
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