Proof: Algebra 17
Let's prove the following theorem:
s ⋅ (1 / s) = 1
    
    
    
    Proof:
| # | Claim | Reason | 
|---|---|---|
| 1 | s / s = 1 | s / s = 1 | 
| 2 | s / s = s ⋅ (1 / s) | s / s = s ⋅ (1 / s) | 
| 3 | s ⋅ (1 / s) = 1 | if s / s = s ⋅ (1 / s) and s / s = 1, then s ⋅ (1 / s) = 1 | 
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