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Theorem difeq12dOLD 24967
 Description: Deduction adding difference to the right in a class equality. (Moved into main set.mm as difeq12d 3295 and may be deleted by mathbox owner, FL. --NM 2-Jul-2014.) (Contributed by FL, 29-May-2014.)
Hypotheses
Ref Expression
difeq12dOLD.1
difeq12dOLD.2
Assertion
Ref Expression
difeq12dOLD

Proof of Theorem difeq12dOLD
StepHypRef Expression
1 difeq12dOLD.1 . 2
2 difeq12dOLD.2 . 2
31, 2difeq12d 3295 1
 Colors of variables: wff set class Syntax hints:   wi 4   wceq 1623   cdif 3149 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264 This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-tru 1310  df-ex 1529  df-nf 1532  df-sb 1630  df-clab 2270  df-cleq 2276  df-clel 2279  df-nfc 2408  df-ral 2548  df-rab 2552  df-dif 3155
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