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Theorem difeq1d 3061
 Description: Deduction adding difference to the right in a class equality. (Contributed by NM, 15-Nov-2002.)
Hypothesis
Ref Expression
difeq1d.1 (𝜑𝐴 = 𝐵)
Assertion
Ref Expression
difeq1d (𝜑 → (𝐴𝐶) = (𝐵𝐶))

Proof of Theorem difeq1d
StepHypRef Expression
1 difeq1d.1 . 2 (𝜑𝐴 = 𝐵)
2 difeq1 3055 . 2 (𝐴 = 𝐵 → (𝐴𝐶) = (𝐵𝐶))
31, 2syl 14 1 (𝜑 → (𝐴𝐶) = (𝐵𝐶))
 Colors of variables: wff set class Syntax hints:   → wi 4   = wceq 1243   ∖ cdif 2914 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-rab 2315  df-dif 2920 This theorem is referenced by:  difeq12d  3063  diftpsn3  3505  phplem4  6318  phplem3g  6319  phplem4on  6329
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