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Theorem addcan2i 8037
Description: Cancellation law for addition. Theorem I.1 of [Apostol] p. 18. (Contributed by NM, 14-May-2003.) (Revised by Scott Fenton, 3-Jan-2013.)
Hypotheses
Ref Expression
addcani.1 𝐴 ∈ ℂ
addcani.2 𝐵 ∈ ℂ
addcani.3 𝐶 ∈ ℂ
Assertion
Ref Expression
addcan2i ((𝐴 + 𝐶) = (𝐵 + 𝐶) ↔ 𝐴 = 𝐵)

Proof of Theorem addcan2i
StepHypRef Expression
1 addcani.1 . 2 𝐴 ∈ ℂ
2 addcani.2 . 2 𝐵 ∈ ℂ
3 addcani.3 . 2 𝐶 ∈ ℂ
4 addcan2 8035 . 2 ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 + 𝐶) = (𝐵 + 𝐶) ↔ 𝐴 = 𝐵))
51, 2, 3, 4mp3an 1316 1 ((𝐴 + 𝐶) = (𝐵 + 𝐶) ↔ 𝐴 = 𝐵)
Colors of variables: wff set class
Syntax hints:  wb 104   = wceq 1332  wcel 2125  (class class class)co 5814  cc 7709   + caddc 7714
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1481  ax-10 1482  ax-11 1483  ax-i12 1484  ax-bndl 1486  ax-4 1487  ax-17 1503  ax-i9 1507  ax-ial 1511  ax-i5r 1512  ax-ext 2136  ax-resscn 7803  ax-1cn 7804  ax-icn 7806  ax-addcl 7807  ax-addrcl 7808  ax-mulcl 7809  ax-addcom 7811  ax-addass 7813  ax-distr 7815  ax-i2m1 7816  ax-0id 7819  ax-rnegex 7820  ax-cnre 7822
This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-nf 1438  df-sb 1740  df-clab 2141  df-cleq 2147  df-clel 2150  df-nfc 2285  df-ral 2437  df-rex 2438  df-v 2711  df-un 3102  df-in 3104  df-ss 3111  df-sn 3562  df-pr 3563  df-op 3565  df-uni 3769  df-br 3962  df-iota 5128  df-fv 5171  df-ov 5817
This theorem is referenced by: (None)
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