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| Mirrors > Home > MPE Home > Th. List > Mathboxes > resubidaddlidlem | Structured version Visualization version GIF version | ||
| Description: Lemma for resubidaddlid 43197. A special case of npncan 11497. (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 43180 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 −ℝ 𝐵) ∈ ℝ) | |
| 5 | 2, 3, 4 | syl2anc 596 | . . 3 ⊢ (𝜑 → (𝐴 −ℝ 𝐵) ∈ ℝ) |
| 6 | rersubcl 43180 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐵 −ℝ 𝐶) ∈ ℝ) | |
| 7 | 3, 1, 6 | syl2anc 596 | . . 3 ⊢ (𝜑 → (𝐵 −ℝ 𝐶) ∈ ℝ) |
| 8 | 5, 7 | readdcld 11256 | . 2 ⊢ (𝜑 → ((𝐴 −ℝ 𝐵) + (𝐵 −ℝ 𝐶)) ∈ ℝ) |
| 9 | resubidaddridlem.1 | . . . . . 6 ⊢ (𝜑 → (𝐴 −ℝ 𝐵) = (𝐵 −ℝ 𝐶)) | |
| 10 | 9 | eqcomd 2772 | . . . . 5 ⊢ (𝜑 → (𝐵 −ℝ 𝐶) = (𝐴 −ℝ 𝐵)) |
| 11 | 3, 1, 5 | resubaddd 43182 | . . . . 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 7438 | . . 3 ⊢ (𝜑 → ((𝐶 + (𝐴 −ℝ 𝐵)) + (𝐵 −ℝ 𝐶)) = (𝐵 + (𝐵 −ℝ 𝐶))) |
| 14 | 1 | recnd 11255 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| 15 | 5 | recnd 11255 | . . . 4 ⊢ (𝜑 → (𝐴 −ℝ 𝐵) ∈ ℂ) |
| 16 | 7 | recnd 11255 | . . . 4 ⊢ (𝜑 → (𝐵 −ℝ 𝐶) ∈ ℂ) |
| 17 | 14, 15, 16 | addassd 11249 | . . 3 ⊢ (𝜑 → ((𝐶 + (𝐴 −ℝ 𝐵)) + (𝐵 −ℝ 𝐶)) = (𝐶 + ((𝐴 −ℝ 𝐵) + (𝐵 −ℝ 𝐶)))) |
| 18 | 2, 3, 7 | resubaddd 43182 | . . . 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 2809 | . 2 ⊢ (𝜑 → (𝐶 + ((𝐴 −ℝ 𝐵) + (𝐵 −ℝ 𝐶))) = 𝐴) |
| 21 | 1, 8, 20 | reladdrsub 43187 | 1 ⊢ (𝜑 → ((𝐴 −ℝ 𝐵) + (𝐵 −ℝ 𝐶)) = (𝐴 −ℝ 𝐶)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 (class class class)co 7423 ℝcr 11117 + caddc 11121 −ℝ cresub 43167 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-resscn 11175 ax-addrcl 11179 ax-addass 11183 ax-rnegex 11189 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-br 5115 df-opab 5179 df-mpt 5198 df-id 5561 df-po 5574 df-so 5575 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11263 df-mnf 11264 df-ltxr 11266 df-resub 43168 |
| This theorem is used by: (None) |
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