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| Mirrors > Home > MPE Home > Th. List > Mathboxes > resubidaddlidlem | Structured version Visualization version GIF version | ||
| Description: Lemma for resubidaddlid 43016. A special case of npncan 11467. (Contributed by Steven Nguyen, 8-Jan-2023.) |
| Ref | Expression |
|---|---|
| resubidaddridlem.a | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| resubidaddridlem.b | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| resubidaddridlem.c | ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| resubidaddridlem.1 | ⊢ (𝜑 → (𝐴 −ℝ 𝐵) = (𝐵 −ℝ 𝐶)) |
| Ref | Expression |
|---|---|
| resubidaddlidlem | ⊢ (𝜑 → ((𝐴 −ℝ 𝐵) + (𝐵 −ℝ 𝐶)) = (𝐴 −ℝ 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | resubidaddridlem.c | . 2 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 2 | resubidaddridlem.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 3 | resubidaddridlem.b | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 4 | rersubcl 42999 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 −ℝ 𝐵) ∈ ℝ) | |
| 5 | 2, 3, 4 | syl2anc 595 | . . 3 ⊢ (𝜑 → (𝐴 −ℝ 𝐵) ∈ ℝ) |
| 6 | rersubcl 42999 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐵 −ℝ 𝐶) ∈ ℝ) | |
| 7 | 3, 1, 6 | syl2anc 595 | . . 3 ⊢ (𝜑 → (𝐵 −ℝ 𝐶) ∈ ℝ) |
| 8 | 5, 7 | readdcld 11226 | . 2 ⊢ (𝜑 → ((𝐴 −ℝ 𝐵) + (𝐵 −ℝ 𝐶)) ∈ ℝ) |
| 9 | resubidaddridlem.1 | . . . . . 6 ⊢ (𝜑 → (𝐴 −ℝ 𝐵) = (𝐵 −ℝ 𝐶)) | |
| 10 | 9 | eqcomd 2771 | . . . . 5 ⊢ (𝜑 → (𝐵 −ℝ 𝐶) = (𝐴 −ℝ 𝐵)) |
| 11 | 3, 1, 5 | resubaddd 43001 | . . . . 5 ⊢ (𝜑 → ((𝐵 −ℝ 𝐶) = (𝐴 −ℝ 𝐵) ↔ (𝐶 + (𝐴 −ℝ 𝐵)) = 𝐵)) |
| 12 | 10, 11 | mpbid 235 | . . . 4 ⊢ (𝜑 → (𝐶 + (𝐴 −ℝ 𝐵)) = 𝐵) |
| 13 | 12 | oveq1d 7415 | . . 3 ⊢ (𝜑 → ((𝐶 + (𝐴 −ℝ 𝐵)) + (𝐵 −ℝ 𝐶)) = (𝐵 + (𝐵 −ℝ 𝐶))) |
| 14 | 1 | recnd 11225 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| 15 | 5 | recnd 11225 | . . . 4 ⊢ (𝜑 → (𝐴 −ℝ 𝐵) ∈ ℂ) |
| 16 | 7 | recnd 11225 | . . . 4 ⊢ (𝜑 → (𝐵 −ℝ 𝐶) ∈ ℂ) |
| 17 | 14, 15, 16 | addassd 11219 | . . 3 ⊢ (𝜑 → ((𝐶 + (𝐴 −ℝ 𝐵)) + (𝐵 −ℝ 𝐶)) = (𝐶 + ((𝐴 −ℝ 𝐵) + (𝐵 −ℝ 𝐶)))) |
| 18 | 2, 3, 7 | resubaddd 43001 | . . . 4 ⊢ (𝜑 → ((𝐴 −ℝ 𝐵) = (𝐵 −ℝ 𝐶) ↔ (𝐵 + (𝐵 −ℝ 𝐶)) = 𝐴)) |
| 19 | 9, 18 | mpbid 235 | . . 3 ⊢ (𝜑 → (𝐵 + (𝐵 −ℝ 𝐶)) = 𝐴) |
| 20 | 13, 17, 19 | 3eqtr3d 2808 | . 2 ⊢ (𝜑 → (𝐶 + ((𝐴 −ℝ 𝐵) + (𝐵 −ℝ 𝐶))) = 𝐴) |
| 21 | 1, 8, 20 | reladdrsub 43006 | 1 ⊢ (𝜑 → ((𝐴 −ℝ 𝐵) + (𝐵 −ℝ 𝐶)) = (𝐴 −ℝ 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1563 ∈ wcel 2145 (class class class)co 7400 ℝcr 11087 + caddc 11091 −ℝ cresub 42986 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5251 ax-nul 5261 ax-pow 5327 ax-pr 5395 ax-un 7722 ax-resscn 11145 ax-addrcl 11149 ax-addass 11153 ax-rnegex 11159 ax-pre-lttri 11162 ax-pre-lttrn 11163 ax-pre-ltadd 11164 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3370 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4869 df-br 5106 df-opab 5168 df-mpt 5187 df-id 5547 df-po 5560 df-so 5561 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-er 8682 df-en 8932 df-dom 8933 df-sdom 8934 df-pnf 11233 df-mnf 11234 df-ltxr 11236 df-resub 42987 |
| This theorem is referenced by: (None) |
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