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Theorem 7p1e8 8553
Description: 7 + 1 = 8. (Contributed by Mario Carneiro, 18-Apr-2015.)
Assertion
Ref Expression
7p1e8 (7 + 1) = 8

Proof of Theorem 7p1e8
StepHypRef Expression
1 df-8 8485 . 2 8 = (7 + 1)
21eqcomi 2092 1 (7 + 1) = 8
Colors of variables: wff set class
Syntax hints:   = wceq 1289  (class class class)co 5652  1c1 7349   + caddc 7351  7c7 8476  8c8 8477
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-5 1381  ax-gen 1383  ax-ext 2070
This theorem depends on definitions:  df-bi 115  df-cleq 2081  df-8 8485
This theorem is referenced by:  7t4e28  8985  9t9e81  9003
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