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Theorem resubadd 40939
Description: Relation between real subtraction and addition. Based on subadd 11428. (Contributed by Steven Nguyen, 7-Jan-2023.)
Assertion
Ref Expression
resubadd ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((𝐴 𝐵) = 𝐶 ↔ (𝐵 + 𝐶) = 𝐴))

Proof of Theorem resubadd
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 resubval 40927 . . . 4 ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 𝐵) = (𝑥 ∈ ℝ (𝐵 + 𝑥) = 𝐴))
21eqeq1d 2733 . . 3 ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐴 𝐵) = 𝐶 ↔ (𝑥 ∈ ℝ (𝐵 + 𝑥) = 𝐴) = 𝐶))
323adant3 1132 . 2 ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((𝐴 𝐵) = 𝐶 ↔ (𝑥 ∈ ℝ (𝐵 + 𝑥) = 𝐴) = 𝐶))
4 resubeu 40937 . . . . 5 ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → ∃!𝑥 ∈ ℝ (𝐵 + 𝑥) = 𝐴)
5 oveq2 7385 . . . . . . 7 (𝑥 = 𝐶 → (𝐵 + 𝑥) = (𝐵 + 𝐶))
65eqeq1d 2733 . . . . . 6 (𝑥 = 𝐶 → ((𝐵 + 𝑥) = 𝐴 ↔ (𝐵 + 𝐶) = 𝐴))
76riota2 7359 . . . . 5 ((𝐶 ∈ ℝ ∧ ∃!𝑥 ∈ ℝ (𝐵 + 𝑥) = 𝐴) → ((𝐵 + 𝐶) = 𝐴 ↔ (𝑥 ∈ ℝ (𝐵 + 𝑥) = 𝐴) = 𝐶))
84, 7sylan2 593 . . . 4 ((𝐶 ∈ ℝ ∧ (𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ)) → ((𝐵 + 𝐶) = 𝐴 ↔ (𝑥 ∈ ℝ (𝐵 + 𝑥) = 𝐴) = 𝐶))
983impb 1115 . . 3 ((𝐶 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → ((𝐵 + 𝐶) = 𝐴 ↔ (𝑥 ∈ ℝ (𝐵 + 𝑥) = 𝐴) = 𝐶))
1093com13 1124 . 2 ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((𝐵 + 𝐶) = 𝐴 ↔ (𝑥 ∈ ℝ (𝐵 + 𝑥) = 𝐴) = 𝐶))
113, 10bitr4d 281 1 ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((𝐴 𝐵) = 𝐶 ↔ (𝐵 + 𝐶) = 𝐴))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 396  w3a 1087   = wceq 1541  wcel 2106  ∃!wreu 3362  crio 7332  (class class class)co 7377  cr 11074   + caddc 11078   cresub 40925
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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2702  ax-sep 5276  ax-nul 5283  ax-pow 5340  ax-pr 5404  ax-un 7692  ax-resscn 11132  ax-addrcl 11136  ax-addass 11140  ax-rnegex 11146  ax-pre-lttri 11149  ax-pre-lttrn 11150  ax-pre-ltadd 11151
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3or 1088  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2533  df-eu 2562  df-clab 2709  df-cleq 2723  df-clel 2809  df-nfc 2884  df-ne 2940  df-nel 3046  df-ral 3061  df-rex 3070  df-rmo 3364  df-reu 3365  df-rab 3419  df-v 3461  df-sbc 3758  df-csb 3874  df-dif 3931  df-un 3933  df-in 3935  df-ss 3945  df-nul 4303  df-if 4507  df-pw 4582  df-sn 4607  df-pr 4609  df-op 4613  df-uni 4886  df-br 5126  df-opab 5188  df-mpt 5209  df-id 5551  df-po 5565  df-so 5566  df-xp 5659  df-rel 5660  df-cnv 5661  df-co 5662  df-dm 5663  df-rn 5664  df-res 5665  df-ima 5666  df-iota 6468  df-fun 6518  df-fn 6519  df-f 6520  df-f1 6521  df-fo 6522  df-f1o 6523  df-fv 6524  df-riota 7333  df-ov 7380  df-oprab 7381  df-mpo 7382  df-er 8670  df-en 8906  df-dom 8907  df-sdom 8908  df-pnf 11215  df-mnf 11216  df-ltxr 11218  df-resub 40926
This theorem is referenced by:  resubaddd  40940  repncan3  40943  reladdrsub  40945  sn-00id  40961
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