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Theorem 4p1e5 9086
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 9012 . 2 5 = (4 + 1)
21eqcomi 2193 1 (4 + 1) = 5
Colors of variables: wff set class
Syntax hints:   = wceq 1364  (class class class)co 5897  1c1 7843   + caddc 7845  4c4 9003  5c5 9004
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1458  ax-gen 1460  ax-ext 2171
This theorem depends on definitions:  df-bi 117  df-cleq 2182  df-5 9012
This theorem is referenced by:  8t7e56  9534  9t6e54  9540  ex-exp  14957  ex-fac  14958
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