Theorem addneintr2d 8410

Description: Introducing a term on the right-hand side of a sum in a negated equality. Contrapositive of addcan2ad 8408. Consequence of addcan2d 8406. (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 8406	. . 3 |- ( ph -> ( ( A + C ) = ( B + C ) <-> A = B ) )
6	5	necon3bid 2444	. 2 |- ( ph -> ( ( A + C ) =/= ( B + C ) <-> A =/= B ) )
7	1, 6	mpbird 167	1 |- ( ph -> ( A + C ) =/= ( B + C ) )

Syntax hints:   -> wi 4   e. wcel 2202   =/= wne 2403  (class class class)co 6028   CCcc 8073   + caddc 8078

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213  ax-resscn 8167  ax-1cn 8168  ax-icn 8170  ax-addcl 8171  ax-addrcl 8172  ax-mulcl 8173  ax-addcom 8175  ax-addass 8177  ax-distr 8179  ax-i2m1 8180  ax-0id 8183  ax-rnegex 8184  ax-cnre 8186

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-ral 2516  df-rex 2517  df-v 2805  df-un 3205  df-in 3207  df-ss 3214  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-br 4094  df-iota 5293  df-fv 5341  df-ov 6031

This theorem is referenced by:  modsumfzodifsn  10704