Theorem 2p6e8

Description: 2 + 6 = 8. (Contributed by SN, 24-Aug-2026)

	Ref	Expression
Assertion	2p6e8	|- ( 2 + 6 ) = 8

Proof

Step	Hyp	Ref	Expression
1		2cn	|- 2 e. CC
2		4cn	|- 4 e. CC
3	1 1 2	addassi	|- ( ( 2 + 2 ) + 4 ) = ( 2 + ( 2 + 4 ) )
4		2p2e4	|- ( 2 + 2 ) = 4
5	4	oveq1i	|- ( ( 2 + 2 ) + 4 ) = ( 4 + 4 )
6		4p4e8	|- ( 4 + 4 ) = 8
7	5 6	eqtri	|- ( ( 2 + 2 ) + 4 ) = 8
8		2p4e6	|- ( 2 + 4 ) = 6
9	8	oveq2i	|- ( 2 + ( 2 + 4 ) ) = ( 2 + 6 )
10	3 7 9	3eqtr3ri	|- ( 2 + 6 ) = 8