ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  addcanad GIF version

Theorem addcanad 8502
Description: Cancelling a term on the left-hand side of a sum in an equality. Consequence of addcand 8500. (Contributed by David Moews, 28-Feb-2017.)
Hypotheses
Ref Expression
addcand.1 (𝜑𝐴 ∈ ℂ)
addcand.2 (𝜑𝐵 ∈ ℂ)
addcand.3 (𝜑𝐶 ∈ ℂ)
addcanad.4 (𝜑 → (𝐴 + 𝐵) = (𝐴 + 𝐶))
Assertion
Ref Expression
addcanad (𝜑𝐵 = 𝐶)

Proof of Theorem addcanad
StepHypRef Expression
1 addcanad.4 . 2 (𝜑 → (𝐴 + 𝐵) = (𝐴 + 𝐶))
2 addcand.1 . . 3 (𝜑𝐴 ∈ ℂ)
3 addcand.2 . . 3 (𝜑𝐵 ∈ ℂ)
4 addcand.3 . . 3 (𝜑𝐶 ∈ ℂ)
52, 3, 4addcand 8500 . 2 (𝜑 → ((𝐴 + 𝐵) = (𝐴 + 𝐶) ↔ 𝐵 = 𝐶))
61, 5mpbid 147 1 (𝜑𝐵 = 𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1402  wcel 2209  (class class class)co 6075  cc 8167   + caddc 8172
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220  ax-resscn 8261  ax-1cn 8262  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-addass 8271  ax-distr 8273  ax-i2m1 8274  ax-0id 8277  ax-rnegex 8278  ax-cnre 8280
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-br 4126  df-iota 5332  df-fv 5380  df-ov 6078
This theorem is referenced by:  divalglemqt  12664
  Copyright terms: Public domain W3C validator