Metamath Proof Explorer


Theorem syl5eqr

Description: An equality transitivity deduction. (Contributed by NM, 5-Aug-1993)

Ref Expression
Hypotheses syl5eqr.1
|- B = A
syl5eqr.2
|- ( ph -> B = C )
Assertion syl5eqr
|- ( ph -> A = C )

Proof

Step Hyp Ref Expression
1 syl5eqr.1
 |-  B = A
2 syl5eqr.2
 |-  ( ph -> B = C )
3 1 eqcomi
 |-  A = B
4 3 2 syl5eq
 |-  ( ph -> A = C )