Theorem comraddi

Description: Commute RHS addition. See addcomli to commute addition on LHS. (Contributed by David A. Wheeler, 11-Oct-2018)

	Ref	Expression
Hypotheses	comraddi.1	|- B e. CC
	comraddi.2	|- C e. CC
	comraddi.3	|- A = ( B + C )
Assertion	comraddi	|- A = ( C + B )

Proof

Step	Hyp	Ref	Expression
1		comraddi.1	|- B e. CC
2		comraddi.2	|- C e. CC
3		comraddi.3	|- A = ( B + C )
4	1 2	addcomi	|- ( B + C ) = ( C + B )
5	3 4	eqtri	|- A = ( C + B )