Theorem 4p1e5 8046

Description: 4 + 1 = 5. (Contributed by Mario Carneiro, 18-Apr-2015.)

Assertion

Ref	Expression
4p1e5	⊢ (4 + 1) = 5

Proof of Theorem 4p1e5

Step	Hyp	Ref	Expression
1		df-5 7976	. 2 ⊢ 5 = (4 + 1)
2	1	eqcomi 2044	1 ⊢ (4 + 1) = 5

Syntax hints:   = wceq 1243  (class class class)co 5512  1c1 6890   + caddc 6892  4c4 7966  5c5 7967

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-5 7976

This theorem is referenced by:  8t7e56  8460  9t6e54  8466