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Theorem sbequ8 2079
Description: Elimination of equality from antecedent after substitution. (Contributed by NM, 5-Aug-1993.)
Assertion
Ref Expression
sbequ8

Proof of Theorem sbequ8
StepHypRef Expression
1 equsb1 2034 . . 3
21a1bi 327 . 2
3 sbim 2065 . 2
42, 3bitr4i 243 1
Colors of variables: wff setvar class
Syntax hints:   wi 4   wb 176  wsb 1648
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925
This theorem depends on definitions:  df-bi 177  df-an 360  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649
This theorem is referenced by: (None)
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