Proof: Algebra 7
Let's prove the following theorem:
(a ⋅ x) / x = a
Proof:
| # | Claim | Reason |
|---|---|---|
| 1 | x / x = 1 | x / x = 1 |
| 2 | a ⋅ (x / x) = a ⋅ 1 | if x / x = 1, then a ⋅ (x / x) = a ⋅ 1 |
| 3 | a ⋅ 1 = a | a ⋅ 1 = a |
| 4 | a ⋅ (x / x) = a | if a ⋅ (x / x) = a ⋅ 1 and a ⋅ 1 = a, then a ⋅ (x / x) = a |
| 5 | a ⋅ (x / x) = (a ⋅ x) / x | a ⋅ (x / x) = (a ⋅ x) / x |
| 6 | (a ⋅ x) / x = a | if a ⋅ (x / x) = (a ⋅ x) / x and a ⋅ (x / x) = a, then (a ⋅ x) / x = a |
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