Theorem 3p5e8

Description: 3 + 5 = 8. (Contributed by SN, 24-Aug-2026)

	Ref	Expression
Assertion	3p5e8	$$⊢3+5=8$$

Proof

Step	Hyp	Ref	Expression
1		3cn	$$⊢3\in ℂ$$
2		2cn	$$⊢2\in ℂ$$
3	1 2 1	addassi	$$⊢3+2+3=3+2+3$$
4		3p2e5	$$⊢3+2=5$$
5	4	oveq1i	$$⊢3+2+3=5+3$$
6		5p3e8	$$⊢5+3=8$$
7	5 6	eqtri	$$⊢3+2+3=8$$
8		2p3e5	$$⊢2+3=5$$
9	8	oveq2i	$$⊢3+2+3=3+5$$
10	3 7 9	3eqtr3ri	$$⊢3+5=8$$