Theorem addneintr2d 7434

Description: Introducing a term on the right-hand side of a sum in a negated equality. Contrapositive of addcan2ad 7432. Consequence of addcan2d 7430. (Contributed by David Moews, 28-Feb-2017.)

Hypotheses

Ref	Expression
addcand.1	|- ( ph -> A e. CC )
addcand.2	|- ( ph -> B e. CC )
addcand.3	|- ( ph -> C e. CC )
addneintr2d.4	|- ( ph -> A =/= B )

Assertion

Ref	Expression
addneintr2d	|- ( ph -> ( A + C ) =/= ( B + C ) )

Proof of Theorem addneintr2d

Step	Hyp	Ref	Expression
1		addneintr2d.4	. 2 |- ( ph -> A =/= B )
2		addcand.1	. . . 4 |- ( ph -> A e. CC )
3		addcand.2	. . . 4 |- ( ph -> B e. CC )
4		addcand.3	. . . 4 |- ( ph -> C e. CC )
5	2, 3, 4	addcan2d 7430	. . 3 |- ( ph -> ( ( A + C ) = ( B + C ) <-> A = B ) )
6	5	necon3bid 2290	. 2 |- ( ph -> ( ( A + C ) =/= ( B + C ) <-> A =/= B ) )
7	1, 6	mpbird 165	1 |- ( ph -> ( A + C ) =/= ( B + C ) )

Syntax hints:   -> wi 4   e. wcel 1434   =/= wne 2249  (class class class)co 5564   CCcc 7111   + caddc 7116

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-in1 577  ax-in2 578  ax-io 663  ax-5 1377  ax-7 1378  ax-gen 1379  ax-ie1 1423  ax-ie2 1424  ax-8 1436  ax-10 1437  ax-11 1438  ax-i12 1439  ax-bndl 1440  ax-4 1441  ax-17 1460  ax-i9 1464  ax-ial 1468  ax-i5r 1469  ax-ext 2065  ax-resscn 7200  ax-1cn 7201  ax-icn 7203  ax-addcl 7204  ax-addrcl 7205  ax-mulcl 7206  ax-addcom 7208  ax-addass 7210  ax-distr 7212  ax-i2m1 7213  ax-0id 7216  ax-rnegex 7217  ax-cnre 7219

This theorem depends on definitions:  df-bi 115  df-3an 922  df-tru 1288  df-nf 1391  df-sb 1688  df-clab 2070  df-cleq 2076  df-clel 2079  df-nfc 2212  df-ne 2250  df-ral 2358  df-rex 2359  df-v 2612  df-un 2986  df-in 2988  df-ss 2995  df-sn 3422  df-pr 3423  df-op 3425  df-uni 3622  df-br 3806  df-iota 4917  df-fv 4960  df-ov 5567

This theorem is referenced by:  modsumfzodifsn  9548