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Mirrors > Home > ILE Home > Th. List > 5p3e8 | GIF version |
Description: 5 + 3 = 8. (Contributed by NM, 11-May-2004.) |
Ref | Expression |
---|---|
5p3e8 | ⊢ (5 + 3) = 8 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-3 8974 | . . . 4 ⊢ 3 = (2 + 1) | |
2 | 1 | oveq2i 5882 | . . 3 ⊢ (5 + 3) = (5 + (2 + 1)) |
3 | 5cn 8994 | . . . 4 ⊢ 5 ∈ ℂ | |
4 | 2cn 8985 | . . . 4 ⊢ 2 ∈ ℂ | |
5 | ax-1cn 7900 | . . . 4 ⊢ 1 ∈ ℂ | |
6 | 3, 4, 5 | addassi 7961 | . . 3 ⊢ ((5 + 2) + 1) = (5 + (2 + 1)) |
7 | 2, 6 | eqtr4i 2201 | . 2 ⊢ (5 + 3) = ((5 + 2) + 1) |
8 | df-8 8979 | . . 3 ⊢ 8 = (7 + 1) | |
9 | 5p2e7 9060 | . . . 4 ⊢ (5 + 2) = 7 | |
10 | 9 | oveq1i 5881 | . . 3 ⊢ ((5 + 2) + 1) = (7 + 1) |
11 | 8, 10 | eqtr4i 2201 | . 2 ⊢ 8 = ((5 + 2) + 1) |
12 | 7, 11 | eqtr4i 2201 | 1 ⊢ (5 + 3) = 8 |
Colors of variables: wff set class |
Syntax hints: = wceq 1353 (class class class)co 5871 1c1 7808 + caddc 7810 2c2 8965 3c3 8966 5c5 8968 7c7 8970 8c8 8971 |
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 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-ext 2159 ax-resscn 7899 ax-1cn 7900 ax-1re 7901 ax-addrcl 7904 ax-addass 7909 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-rex 2461 df-v 2739 df-un 3133 df-in 3135 df-ss 3142 df-sn 3598 df-pr 3599 df-op 3601 df-uni 3810 df-br 4003 df-iota 5176 df-fv 5222 df-ov 5874 df-2 8973 df-3 8974 df-4 8975 df-5 8976 df-6 8977 df-7 8978 df-8 8979 |
This theorem is referenced by: 5p4e9 9062 ef01bndlem 11756 lgsdir2lem1 14291 |
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