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Theorem negdii 8610
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 8330 . . . 4 (𝐴 + 𝐵) ∈ ℂ
43negidi 8595 . . 3 ((𝐴 + 𝐵) + -(𝐴 + 𝐵)) = 0
51negidi 8595 . . . . 5 (𝐴 + -𝐴) = 0
62negidi 8595 . . . . 5 (𝐵 + -𝐵) = 0
75, 6oveq12i 6097 . . . 4 ((𝐴 + -𝐴) + (𝐵 + -𝐵)) = (0 + 0)
8 00id 8467 . . . 4 (0 + 0) = 0
97, 8eqtri 2259 . . 3 ((𝐴 + -𝐴) + (𝐵 + -𝐵)) = 0
101negcli 8594 . . . 4 -𝐴 ∈ ℂ
112negcli 8594 . . . 4 -𝐵 ∈ ℂ
121, 10, 2, 11add4i 8491 . . 3 ((𝐴 + -𝐴) + (𝐵 + -𝐵)) = ((𝐴 + 𝐵) + (-𝐴 + -𝐵))
134, 9, 123eqtr2i 2265 . 2 ((𝐴 + 𝐵) + -(𝐴 + 𝐵)) = ((𝐴 + 𝐵) + (-𝐴 + -𝐵))
143negcli 8594 . . 3 -(𝐴 + 𝐵) ∈ ℂ
1510, 11addcli 8330 . . 3 (-𝐴 + -𝐵) ∈ ℂ
163, 14, 15addcani 8508 . 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
This proof depends on syntax axioms:   = wceq 1402  wcel 2209  (class class class)co 6085  cc 8177  0cc0 8179   + caddc 8182  -cneg 8498
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  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-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-setind 4684  ax-resscn 8271  ax-1cn 8272  ax-icn 8274  ax-addcl 8275  ax-addrcl 8276  ax-mulcl 8277  ax-addcom 8279  ax-addass 8281  ax-distr 8283  ax-i2m1 8284  ax-0id 8287  ax-rnegex 8288  ax-cnre 8290
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-br 4131  df-opab 4193  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-iota 5337  df-fun 5379  df-fv 5385  df-riota 6038  df-ov 6088  df-oprab 6089  df-mpo 6090  df-sub 8499  df-neg 8500
This theorem is used by:  negsubdii  8611
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