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Mirrors > Home > ILE Home > Th. List > 7p1e8 | GIF version |
Description: 7 + 1 = 8. (Contributed by Mario Carneiro, 18-Apr-2015.) |
Ref | Expression |
---|---|
7p1e8 | ⊢ (7 + 1) = 8 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-8 8785 | . 2 ⊢ 8 = (7 + 1) | |
2 | 1 | eqcomi 2143 | 1 ⊢ (7 + 1) = 8 |
Colors of variables: wff set class |
Syntax hints: = wceq 1331 (class class class)co 5774 1c1 7621 + caddc 7623 7c7 8776 8c8 8777 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1423 ax-gen 1425 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-cleq 2132 df-8 8785 |
This theorem is referenced by: 7t4e28 9292 9t9e81 9310 |
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