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Theorem equtr2 2039
Description: Equality is a left-Euclidean binary relation. Uncurried (imported) form of equeucl 2036. (Contributed by NM, 12-Aug-1993.) (Proof shortened by Andrew Salmon, 25-May-2011.) (Proof shortened by BJ, 11-Apr-2021.)
Assertion
Ref Expression
equtr2 ((𝑥 = 𝑧𝑦 = 𝑧) → 𝑥 = 𝑦)

Proof of Theorem equtr2
StepHypRef Expression
1 equeucl 2036 . 2 (𝑥 = 𝑧 → (𝑦 = 𝑧𝑥 = 𝑦))
21imp 410 1 ((𝑥 = 𝑧𝑦 = 𝑧) → 𝑥 = 𝑦)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 399
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1975  ax-7 2020
This theorem depends on definitions:  df-bi 210  df-an 400  df-ex 1787
This theorem is referenced by:  nfeqf  2382  mo3  2565  mo4  2567  madurid  21407  dchrisumlema  26236  funpartfun  33900  wl-mo3t  35386
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