| 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 11143 add4i 11356 mulcli 11137 recni 11144 2re 12217 3eqtri 2761 10re 12624 5re 12230 1re 11130 4re 12227 eqcomi 2743 5p4e9 12296 oveq1i 7366 df-3 12207. (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 12217 | . . . . 5 ⊢ 2 ∈ ℝ | |
| 2 | 1 | recni 11144 | . . . 4 ⊢ 2 ∈ ℂ |
| 3 | 10re 12624 | . . . . 5 ⊢ ;10 ∈ ℝ | |
| 4 | 3 | recni 11144 | . . . 4 ⊢ ;10 ∈ ℂ |
| 5 | 2, 4 | mulcli 11137 | . . 3 ⊢ (2 · ;10) ∈ ℂ |
| 6 | 5re 12230 | . . . 4 ⊢ 5 ∈ ℝ | |
| 7 | 6 | recni 11144 | . . 3 ⊢ 5 ∈ ℂ |
| 8 | 1re 11130 | . . . . 5 ⊢ 1 ∈ ℝ | |
| 9 | 8 | recni 11144 | . . . 4 ⊢ 1 ∈ ℂ |
| 10 | 9, 4 | mulcli 11137 | . . 3 ⊢ (1 · ;10) ∈ ℂ |
| 11 | 4re 12227 | . . . 4 ⊢ 4 ∈ ℝ | |
| 12 | 11 | recni 11144 | . . 3 ⊢ 4 ∈ ℂ |
| 13 | 5, 7, 10, 12 | add4i 11356 | . 2 ⊢ (((2 · ;10) + 5) + ((1 · ;10) + 4)) = (((2 · ;10) + (1 · ;10)) + (5 + 4)) |
| 14 | 2, 9, 4 | adddiri 11143 | . . . 4 ⊢ ((2 + 1) · ;10) = ((2 · ;10) + (1 · ;10)) |
| 15 | 14 | eqcomi 2743 | . . 3 ⊢ ((2 · ;10) + (1 · ;10)) = ((2 + 1) · ;10) |
| 16 | 5p4e9 12296 | . . 3 ⊢ (5 + 4) = 9 | |
| 17 | 15, 16 | oveq12i 7368 | . 2 ⊢ (((2 · ;10) + (1 · ;10)) + (5 + 4)) = (((2 + 1) · ;10) + 9) |
| 18 | df-3 12207 | . . . . 5 ⊢ 3 = (2 + 1) | |
| 19 | 18 | eqcomi 2743 | . . . 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 2761 | 1 ⊢ (((2 · ;10) + 5) + ((1 · ;10) + 4)) = ((3 · ;10) + 9) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 (class class class)co 7356 0cc0 11024 1c1 11025 + caddc 11027 · cmul 11029 2c2 12198 3c3 12199 4c4 12200 5c5 12201 9c9 12205 ;cdc 12605 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-mpt 5178 df-id 5517 df-po 5530 df-so 5531 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-ov 7359 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-pnf 11166 df-mnf 11167 df-ltxr 11169 df-2 12206 df-3 12207 df-4 12208 df-5 12209 df-6 12210 df-7 12211 df-8 12212 df-9 12213 df-dec 12606 |
| This theorem is referenced by: (None) |
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