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Theorem 4p1e5 8119
Description: 4 + 1 = 5. (Contributed by Mario Carneiro, 18-Apr-2015.)
Assertion
Ref Expression
4p1e5 (4 + 1) = 5

Proof of Theorem 4p1e5
StepHypRef Expression
1 df-5 8052 . 2 5 = (4 + 1)
21eqcomi 2060 1 (4 + 1) = 5
Colors of variables: wff set class
Syntax hints:   = wceq 1259  (class class class)co 5540  1c1 6948   + caddc 6950  4c4 8042  5c5 8043
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 103  ax-ia2 104  ax-ia3 105  ax-5 1352  ax-gen 1354  ax-ext 2038
This theorem depends on definitions:  df-bi 114  df-cleq 2049  df-5 8052
This theorem is referenced by:  8t7e56  8546  9t6e54  8552  ex-fac  10281
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