| Mathbox for Filip Cernatescu |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > problem2 | Structured version Visualization version GIF version | ||
| Description: Practice problem 2. Clues: oveq12i 7368 adddiri 11149 add4i 11362 mulcli 11143 recni 11150 2re 12246 3eqtri 2766 10re 12654 5re 12259 1re 11135 4re 12256 eqcomi 2748 5p4e9 12325 oveq1i 7366 df-3 12236. (Contributed by Filip Cernatescu, 16-Mar-2019.) (Revised by AV, 9-Sep-2021.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| problem2 | ⊢ (((2 · ;10) + 5) + ((1 · ;10) + 4)) = ((3 · ;10) + 9) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2re 12246 | . . . . 5 ⊢ 2 ∈ ℝ | |
| 2 | 1 | recni 11150 | . . . 4 ⊢ 2 ∈ ℂ |
| 3 | 10re 12654 | . . . . 5 ⊢ ;10 ∈ ℝ | |
| 4 | 3 | recni 11150 | . . . 4 ⊢ ;10 ∈ ℂ |
| 5 | 2, 4 | mulcli 11143 | . . 3 ⊢ (2 · ;10) ∈ ℂ |
| 6 | 5re 12259 | . . . 4 ⊢ 5 ∈ ℝ | |
| 7 | 6 | recni 11150 | . . 3 ⊢ 5 ∈ ℂ |
| 8 | 1re 11135 | . . . . 5 ⊢ 1 ∈ ℝ | |
| 9 | 8 | recni 11150 | . . . 4 ⊢ 1 ∈ ℂ |
| 10 | 9, 4 | mulcli 11143 | . . 3 ⊢ (1 · ;10) ∈ ℂ |
| 11 | 4re 12256 | . . . 4 ⊢ 4 ∈ ℝ | |
| 12 | 11 | recni 11150 | . . 3 ⊢ 4 ∈ ℂ |
| 13 | 5, 7, 10, 12 | add4i 11362 | . 2 ⊢ (((2 · ;10) + 5) + ((1 · ;10) + 4)) = (((2 · ;10) + (1 · ;10)) + (5 + 4)) |
| 14 | 2, 9, 4 | adddiri 11149 | . . . 4 ⊢ ((2 + 1) · ;10) = ((2 · ;10) + (1 · ;10)) |
| 15 | 14 | eqcomi 2748 | . . 3 ⊢ ((2 · ;10) + (1 · ;10)) = ((2 + 1) · ;10) |
| 16 | 5p4e9 12325 | . . 3 ⊢ (5 + 4) = 9 | |
| 17 | 15, 16 | oveq12i 7368 | . 2 ⊢ (((2 · ;10) + (1 · ;10)) + (5 + 4)) = (((2 + 1) · ;10) + 9) |
| 18 | df-3 12236 | . . . . 5 ⊢ 3 = (2 + 1) | |
| 19 | 18 | eqcomi 2748 | . . . 4 ⊢ (2 + 1) = 3 |
| 20 | 19 | oveq1i 7366 | . . 3 ⊢ ((2 + 1) · ;10) = (3 · ;10) |
| 21 | 20 | oveq1i 7366 | . 2 ⊢ (((2 + 1) · ;10) + 9) = ((3 · ;10) + 9) |
| 22 | 13, 17, 21 | 3eqtri 2766 | 1 ⊢ (((2 · ;10) + 5) + ((1 · ;10) + 4)) = ((3 · ;10) + 9) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1547 (class class class)co 7356 0cc0 11029 1c1 11030 + caddc 11032 · cmul 11034 2c2 12227 3c3 12228 4c4 12229 5c5 12230 9c9 12234 ;cdc 12635 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-po 5526 df-so 5527 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-ov 7359 df-er 8633 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11172 df-mnf 11173 df-ltxr 11175 df-2 12235 df-3 12236 df-4 12237 df-5 12238 df-6 12239 df-7 12240 df-8 12241 df-9 12242 df-dec 12636 |
| This theorem is referenced by: (None) |
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