Theorem 9p1e10 8051

Description: 9 + 1 = 10. (Contributed by Mario Carneiro, 18-Apr-2015.)

Assertion

Ref	Expression
9p1e10	⊢ (9 + 1) = 10

Proof of Theorem 9p1e10

Step	Hyp	Ref	Expression
1		df-10 7981	. 2 ⊢ 10 = (9 + 1)
2	1	eqcomi 2044	1 ⊢ (9 + 1) = 10

Syntax hints:   = wceq 1243  (class class class)co 5512  1c1 6890   + caddc 6892  9c9 7971  10c10 7972

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-5 1336  ax-gen 1338  ax-ext 2022

This theorem depends on definitions:  df-bi 110  df-cleq 2033  df-10 7981

This theorem is referenced by: (None)