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Theorem equeuclr 1950
Description: Commuted version of equeucl 1951 (equality is left-Euclidean). (Contributed by BJ, 12-Apr-2021.)
Assertion
Ref Expression
equeuclr  |-  ( x  =  z  ->  (
y  =  z  -> 
y  =  x ) )

Proof of Theorem equeuclr
StepHypRef Expression
1 equtrr 1949 . 2  |-  ( z  =  x  ->  (
y  =  z  -> 
y  =  x ) )
21equcoms 1947 1  |-  ( x  =  z  ->  (
y  =  z  -> 
y  =  x ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935
This theorem depends on definitions:  df-bi 197  df-an 386  df-ex 1705
This theorem is referenced by:  equeucl  1951  equequ2  1953  ax13b  1964  aevlem0  1980  equvini  2346  sbequi  2375  wl-ax8clv2  33381
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