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 7168 adddiri 10654 add4i 10864 mulcli 10648 recni 10655 2re 11712 3eqtri 2848 10re 12118 5re 11725 1re 10641 4re 11722 eqcomi 2830 5p4e9 11796 oveq1i 7166 df-3 11702. (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 11712 | . . . . 5 ⊢ 2 ∈ ℝ | |
2 | 1 | recni 10655 | . . . 4 ⊢ 2 ∈ ℂ |
3 | 10re 12118 | . . . . 5 ⊢ ;10 ∈ ℝ | |
4 | 3 | recni 10655 | . . . 4 ⊢ ;10 ∈ ℂ |
5 | 2, 4 | mulcli 10648 | . . 3 ⊢ (2 · ;10) ∈ ℂ |
6 | 5re 11725 | . . . 4 ⊢ 5 ∈ ℝ | |
7 | 6 | recni 10655 | . . 3 ⊢ 5 ∈ ℂ |
8 | 1re 10641 | . . . . 5 ⊢ 1 ∈ ℝ | |
9 | 8 | recni 10655 | . . . 4 ⊢ 1 ∈ ℂ |
10 | 9, 4 | mulcli 10648 | . . 3 ⊢ (1 · ;10) ∈ ℂ |
11 | 4re 11722 | . . . 4 ⊢ 4 ∈ ℝ | |
12 | 11 | recni 10655 | . . 3 ⊢ 4 ∈ ℂ |
13 | 5, 7, 10, 12 | add4i 10864 | . 2 ⊢ (((2 · ;10) + 5) + ((1 · ;10) + 4)) = (((2 · ;10) + (1 · ;10)) + (5 + 4)) |
14 | 2, 9, 4 | adddiri 10654 | . . . 4 ⊢ ((2 + 1) · ;10) = ((2 · ;10) + (1 · ;10)) |
15 | 14 | eqcomi 2830 | . . 3 ⊢ ((2 · ;10) + (1 · ;10)) = ((2 + 1) · ;10) |
16 | 5p4e9 11796 | . . 3 ⊢ (5 + 4) = 9 | |
17 | 15, 16 | oveq12i 7168 | . 2 ⊢ (((2 · ;10) + (1 · ;10)) + (5 + 4)) = (((2 + 1) · ;10) + 9) |
18 | df-3 11702 | . . . . 5 ⊢ 3 = (2 + 1) | |
19 | 18 | eqcomi 2830 | . . . 4 ⊢ (2 + 1) = 3 |
20 | 19 | oveq1i 7166 | . . 3 ⊢ ((2 + 1) · ;10) = (3 · ;10) |
21 | 20 | oveq1i 7166 | . 2 ⊢ (((2 + 1) · ;10) + 9) = ((3 · ;10) + 9) |
22 | 13, 17, 21 | 3eqtri 2848 | 1 ⊢ (((2 · ;10) + 5) + ((1 · ;10) + 4)) = ((3 · ;10) + 9) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 (class class class)co 7156 0cc0 10537 1c1 10538 + caddc 10540 · cmul 10542 2c2 11693 3c3 11694 4c4 11695 5c5 11696 9c9 11700 ;cdc 12099 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-resscn 10594 ax-1cn 10595 ax-icn 10596 ax-addcl 10597 ax-addrcl 10598 ax-mulcl 10599 ax-mulrcl 10600 ax-mulcom 10601 ax-addass 10602 ax-mulass 10603 ax-distr 10604 ax-i2m1 10605 ax-1ne0 10606 ax-1rid 10607 ax-rnegex 10608 ax-rrecex 10609 ax-cnre 10610 ax-pre-lttri 10611 ax-pre-lttrn 10612 ax-pre-ltadd 10613 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-mpt 5147 df-id 5460 df-po 5474 df-so 5475 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-ov 7159 df-er 8289 df-en 8510 df-dom 8511 df-sdom 8512 df-pnf 10677 df-mnf 10678 df-ltxr 10680 df-2 11701 df-3 11702 df-4 11703 df-5 11704 df-6 11705 df-7 11706 df-8 11707 df-9 11708 df-dec 12100 |
This theorem is referenced by: (None) |
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