| 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 7442 adddiri 11335 add4i 11548 mulcli 11329 recni 11336 2re 12430 3eqtri 2790 10re 12850 5re 12443 1re 11321 4re 12440 eqcomi 2772 5p4e9 12513 oveq1i 7440 df-3 12419. (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 12430 | . . . . 5 ⊢ 2 ∈ ℝ | |
| 2 | 1 | recni 11336 | . . . 4 ⊢ 2 ∈ ℂ |
| 3 | 10re 12850 | . . . . 5 ⊢ ;10 ∈ ℝ | |
| 4 | 3 | recni 11336 | . . . 4 ⊢ ;10 ∈ ℂ |
| 5 | 2, 4 | mulcli 11329 | . . 3 ⊢ (2 · ;10) ∈ ℂ |
| 6 | 5re 12443 | . . . 4 ⊢ 5 ∈ ℝ | |
| 7 | 6 | recni 11336 | . . 3 ⊢ 5 ∈ ℂ |
| 8 | 1re 11321 | . . . . 5 ⊢ 1 ∈ ℝ | |
| 9 | 8 | recni 11336 | . . . 4 ⊢ 1 ∈ ℂ |
| 10 | 9, 4 | mulcli 11329 | . . 3 ⊢ (1 · ;10) ∈ ℂ |
| 11 | 4re 12440 | . . . 4 ⊢ 4 ∈ ℝ | |
| 12 | 11 | recni 11336 | . . 3 ⊢ 4 ∈ ℂ |
| 13 | 5, 7, 10, 12 | add4i 11548 | . 2 ⊢ (((2 · ;10) + 5) + ((1 · ;10) + 4)) = (((2 · ;10) + (1 · ;10)) + (5 + 4)) |
| 14 | 2, 9, 4 | adddiri 11335 | . . . 4 ⊢ ((2 + 1) · ;10) = ((2 · ;10) + (1 · ;10)) |
| 15 | 14 | eqcomi 2772 | . . 3 ⊢ ((2 · ;10) + (1 · ;10)) = ((2 + 1) · ;10) |
| 16 | 5p4e9 12513 | . . 3 ⊢ (5 + 4) = 9 | |
| 17 | 15, 16 | oveq12i 7442 | . 2 ⊢ (((2 · ;10) + (1 · ;10)) + (5 + 4)) = (((2 + 1) · ;10) + 9) |
| 18 | df-3 12419 | . . . . 5 ⊢ 3 = (2 + 1) | |
| 19 | 18 | eqcomi 2772 | . . . 4 ⊢ (2 + 1) = 3 |
| 20 | 19 | oveq1i 7440 | . . 3 ⊢ ((2 + 1) · ;10) = (3 · ;10) |
| 21 | 20 | oveq1i 7440 | . 2 ⊢ (((2 + 1) · ;10) + 9) = ((3 · ;10) + 9) |
| 22 | 13, 17, 21 | 3eqtri 2790 | 1 ⊢ (((2 · ;10) + 5) + ((1 · ;10) + 4)) = ((3 · ;10) + 9) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 (class class class)co 7430 0cc0 11213 1c1 11214 + caddc 11216 · cmul 11218 2c2 12410 3c3 12411 4c4 12412 5c5 12413 9c9 12417 ;cdc 12827 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7761 ax-resscn 11270 ax-1cn 11271 ax-icn 11272 ax-addcl 11273 ax-addrcl 11274 ax-mulcl 11275 ax-mulrcl 11276 ax-mulcom 11277 ax-addass 11278 ax-mulass 11279 ax-distr 11280 ax-i2m1 11281 ax-1ne0 11282 ax-1rid 11283 ax-rnegex 11284 ax-rrecex 11285 ax-cnre 11286 ax-pre-lttri 11287 ax-pre-lttrn 11288 ax-pre-ltadd 11289 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-opab 5171 df-mpt 5190 df-id 5550 df-po 5563 df-so 5564 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-ov 7433 df-er 8731 df-en 8988 df-dom 8989 df-sdom 8990 df-pnf 11358 df-mnf 11359 df-ltxr 11361 df-2 12418 df-3 12419 df-4 12420 df-5 12421 df-6 12422 df-7 12423 df-8 12424 df-9 12425 df-dec 12828 |
| This theorem is used by: (None) |
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