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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 9201 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 6028 | . . . 4 ⊢ (5 + 2) = (5 + (1 + 1)) |
| 3 | 5cn 9222 | . . . . 5 ⊢ 5 ∈ ℂ | |
| 4 | ax-1cn 8124 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 8186 | . . . 4 ⊢ ((5 + 1) + 1) = (5 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2255 | . . 3 ⊢ (5 + 2) = ((5 + 1) + 1) |
| 7 | df-6 9205 | . . . 4 ⊢ 6 = (5 + 1) | |
| 8 | 7 | oveq1i 6027 | . . 3 ⊢ (6 + 1) = ((5 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2255 | . 2 ⊢ (5 + 2) = (6 + 1) |
| 10 | df-7 9206 | . 2 ⊢ 7 = (6 + 1) | |
| 11 | 9, 10 | eqtr4i 2255 | 1 ⊢ (5 + 2) = 7 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1397 (class class class)co 6017 1c1 8032 + caddc 8034 2c2 9193 5c5 9196 6c6 9197 7c7 9198 |
| 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-resscn 8123 ax-1cn 8124 ax-1re 8125 ax-addrcl 8128 ax-addass 8133 |
| 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-rex 2516 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-br 4089 df-iota 5286 df-fv 5334 df-ov 6020 df-2 9201 df-3 9202 df-4 9203 df-5 9204 df-6 9205 df-7 9206 |
| This theorem is referenced by: 5p3e8 9290 |
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