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Theorem negdii 8355
Description: Distribution of negative over addition. (Contributed by NM, 28-Jul-1999.) (Proof shortened by Andrew Salmon, 19-Nov-2011.)
Hypotheses
Ref Expression
negidi.1 𝐴 ∈ ℂ
pncan3i.2 𝐵 ∈ ℂ
Assertion
Ref Expression
negdii -(𝐴 + 𝐵) = (-𝐴 + -𝐵)

Proof of Theorem negdii
StepHypRef Expression
1 negidi.1 . . . . 5 𝐴 ∈ ℂ
2 pncan3i.2 . . . . 5 𝐵 ∈ ℂ
31, 2addcli 8075 . . . 4 (𝐴 + 𝐵) ∈ ℂ
43negidi 8340 . . 3 ((𝐴 + 𝐵) + -(𝐴 + 𝐵)) = 0
51negidi 8340 . . . . 5 (𝐴 + -𝐴) = 0
62negidi 8340 . . . . 5 (𝐵 + -𝐵) = 0
75, 6oveq12i 5955 . . . 4 ((𝐴 + -𝐴) + (𝐵 + -𝐵)) = (0 + 0)
8 00id 8212 . . . 4 (0 + 0) = 0
97, 8eqtri 2225 . . 3 ((𝐴 + -𝐴) + (𝐵 + -𝐵)) = 0
101negcli 8339 . . . 4 -𝐴 ∈ ℂ
112negcli 8339 . . . 4 -𝐵 ∈ ℂ
121, 10, 2, 11add4i 8236 . . 3 ((𝐴 + -𝐴) + (𝐵 + -𝐵)) = ((𝐴 + 𝐵) + (-𝐴 + -𝐵))
134, 9, 123eqtr2i 2231 . 2 ((𝐴 + 𝐵) + -(𝐴 + 𝐵)) = ((𝐴 + 𝐵) + (-𝐴 + -𝐵))
143negcli 8339 . . 3 -(𝐴 + 𝐵) ∈ ℂ
1510, 11addcli 8075 . . 3 (-𝐴 + -𝐵) ∈ ℂ
163, 14, 15addcani 8253 . 2 (((𝐴 + 𝐵) + -(𝐴 + 𝐵)) = ((𝐴 + 𝐵) + (-𝐴 + -𝐵)) ↔ -(𝐴 + 𝐵) = (-𝐴 + -𝐵))
1713, 16mpbi 145 1 -(𝐴 + 𝐵) = (-𝐴 + -𝐵)
Colors of variables: wff set class
Syntax hints:   = wceq 1372  wcel 2175  (class class class)co 5943  cc 7922  0cc0 7924   + caddc 7927  -cneg 8243
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-in1 615  ax-in2 616  ax-io 710  ax-5 1469  ax-7 1470  ax-gen 1471  ax-ie1 1515  ax-ie2 1516  ax-8 1526  ax-10 1527  ax-11 1528  ax-i12 1529  ax-bndl 1531  ax-4 1532  ax-17 1548  ax-i9 1552  ax-ial 1556  ax-i5r 1557  ax-14 2178  ax-ext 2186  ax-sep 4161  ax-pow 4217  ax-pr 4252  ax-setind 4584  ax-resscn 8016  ax-1cn 8017  ax-icn 8019  ax-addcl 8020  ax-addrcl 8021  ax-mulcl 8022  ax-addcom 8024  ax-addass 8026  ax-distr 8028  ax-i2m1 8029  ax-0id 8032  ax-rnegex 8033  ax-cnre 8035
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1375  df-fal 1378  df-nf 1483  df-sb 1785  df-eu 2056  df-mo 2057  df-clab 2191  df-cleq 2197  df-clel 2200  df-nfc 2336  df-ne 2376  df-ral 2488  df-rex 2489  df-reu 2490  df-rab 2492  df-v 2773  df-sbc 2998  df-dif 3167  df-un 3169  df-in 3171  df-ss 3178  df-pw 3617  df-sn 3638  df-pr 3639  df-op 3641  df-uni 3850  df-br 4044  df-opab 4105  df-id 4339  df-xp 4680  df-rel 4681  df-cnv 4682  df-co 4683  df-dm 4684  df-iota 5231  df-fun 5272  df-fv 5278  df-riota 5898  df-ov 5946  df-oprab 5947  df-mpo 5948  df-sub 8244  df-neg 8245
This theorem is referenced by:  negsubdii  8356
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