Theorem equncomi 3089

Description: Inference form of equncom 3088. (Contributed by Alan Sare, 18-Feb-2012.)

Hypothesis

Ref	Expression
equncomi.1	|- A = ( B u. C )

Assertion

Ref	Expression
equncomi	|- A = ( C u. B )

Proof of Theorem equncomi

Step	Hyp	Ref	Expression
1		equncomi.1	. 2 |- A = ( B u. C )
2		equncom 3088	. 2 |- ( A = ( B u. C ) <-> A = ( C u. B ) )
3	1, 2	mpbi 133	1 |- A = ( C u. B )

Syntax hints:   = wceq 1243   u. cun 2915

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022

This theorem depends on definitions:  df-bi 110  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-v 2559  df-un 2922

This theorem is referenced by:  disjssun  3285  difprsn1  3503  unidmrn  4850  phplem1  6315