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Theorem opreq12iOLD 4895
Description: Equality inference for operation value.
Hypotheses
Ref Expression
opreq1i.1 |- A = B
opreq12i.2 |- C = D
Assertion
Ref Expression
opreq12iOLD |- (AFC) = (BFD)

Proof of Theorem opreq12iOLD
StepHypRef Expression
1 opreq1i.1 . . 3 |- A = B
21opreq1i 4892 . 2 |- (AFC) = (BFC)
3 opreq12i.2 . . 3 |- C = D
43opreq2i 4893 . 2 |- (BFC) = (BFD)
52, 4eqtri 1908 1 |- (AFC) = (BFD)
Colors of variables: wff set class
Syntax hints:   = wceq 1298  (class class class)co 4884
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 1304  ax-gen 1305  ax-8 1306  ax-9 1307  ax-10 1308  ax-11 1309  ax-12 1310  ax-14 1312  ax-17 1317  ax-4 1319  ax-5o 1321  ax-6o 1324  ax-9o 1481  ax-10o 1500  ax-16 1580  ax-11o 1588  ax-ext 1865  ax-sep 3438  ax-nul 3445  ax-pow 3481  ax-pr 3524
This theorem depends on definitions:  df-bi 164  df-or 241  df-an 242  df-ex 1327  df-sb 1536  df-eu 1775  df-mo 1776  df-clab 1872  df-cleq 1877  df-clel 1880  df-ne 2019  df-rex 2110  df-v 2294  df-dif 2597  df-un 2600  df-in 2603  df-ss 2605  df-nul 2876  df-pw 3035  df-sn 3049  df-pr 3050  df-op 3053  df-uni 3178  df-br 3339  df-opab 3396  df-xp 4000  df-cnv 4002  df-dm 4004  df-rn 4005  df-res 4006  df-ima 4007  df-fv 4014  df-opr 4886
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