| Mathbox for Filip Cernatescu |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > problem3 | Structured version Visualization version GIF version | ||
| Description: Practice problem 3. Clues: eqcomi 2746 eqtri 2760 subaddrii 11482 recni 11158 4re 12241 3re 12237 1re 11144 df-4 12222 addcomi 11336. (Contributed by Filip Cernatescu, 16-Mar-2019.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| problem3.1 | ⊢ 𝐴 ∈ ℂ |
| problem3.2 | ⊢ (𝐴 + 3) = 4 |
| Ref | Expression |
|---|---|
| problem3 | ⊢ 𝐴 = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 4re 12241 | . . . . . 6 ⊢ 4 ∈ ℝ | |
| 2 | 1 | recni 11158 | . . . . 5 ⊢ 4 ∈ ℂ |
| 3 | 3re 12237 | . . . . . 6 ⊢ 3 ∈ ℝ | |
| 4 | 3 | recni 11158 | . . . . 5 ⊢ 3 ∈ ℂ |
| 5 | 1re 11144 | . . . . . 6 ⊢ 1 ∈ ℝ | |
| 6 | 5 | recni 11158 | . . . . 5 ⊢ 1 ∈ ℂ |
| 7 | df-4 12222 | . . . . . 6 ⊢ 4 = (3 + 1) | |
| 8 | 7 | eqcomi 2746 | . . . . 5 ⊢ (3 + 1) = 4 |
| 9 | 2, 4, 6, 8 | subaddrii 11482 | . . . 4 ⊢ (4 − 3) = 1 |
| 10 | 9 | eqcomi 2746 | . . 3 ⊢ 1 = (4 − 3) |
| 11 | problem3.1 | . . . 4 ⊢ 𝐴 ∈ ℂ | |
| 12 | 4, 11 | addcomi 11336 | . . . . 5 ⊢ (3 + 𝐴) = (𝐴 + 3) |
| 13 | problem3.2 | . . . . 5 ⊢ (𝐴 + 3) = 4 | |
| 14 | 12, 13 | eqtri 2760 | . . . 4 ⊢ (3 + 𝐴) = 4 |
| 15 | 2, 4, 11, 14 | subaddrii 11482 | . . 3 ⊢ (4 − 3) = 𝐴 |
| 16 | 10, 15 | eqtri 2760 | . 2 ⊢ 1 = 𝐴 |
| 17 | 16 | eqcomi 2746 | 1 ⊢ 𝐴 = 1 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 ∈ wcel 2114 (class class class)co 7368 ℂcc 11036 1c1 11039 + caddc 11041 − cmin 11376 3c3 12213 4c4 12214 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-po 5540 df-so 5541 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 df-pnf 11180 df-mnf 11181 df-ltxr 11183 df-sub 11378 df-2 12220 df-3 12221 df-4 12222 |
| This theorem is referenced by: (None) |
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