Proof: Algebra 10

Let's prove the following theorem:

(ss) - ((ss) / 4) = (3 / 4) ⋅ (ss)

Proof:

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Proof Table
# Claim Reason
1 ss = (ss) ⋅ 1 ss = (ss) ⋅ 1
2 4 / 4 = 1 4 / 4 = 1
3 (ss) ⋅ (4 / 4) = (ss) ⋅ 1 if 4 / 4 = 1, then (ss) ⋅ (4 / 4) = (ss) ⋅ 1
4 ss = (ss) ⋅ (4 / 4) if ss = (ss) ⋅ 1 and (ss) ⋅ (4 / 4) = (ss) ⋅ 1, then ss = (ss) ⋅ (4 / 4)
5 ((ss) ⋅ (4 / 4)) + ((ss) ⋅ ((-1) / 4)) = (ss) ⋅ ((4 / 4) + ((-1) / 4)) ((ss) ⋅ (4 / 4)) + ((ss) ⋅ ((-1) / 4)) = (ss) ⋅ ((4 / 4) + ((-1) / 4))
6 (4 / 4) + ((-1) / 4) = 3 / 4 (4 / 4) + ((-1) / 4) = 3 / 4
7 ((ss) ⋅ (4 / 4)) + ((ss) ⋅ ((-1) / 4)) = (ss) ⋅ (3 / 4) if ((ss) ⋅ (4 / 4)) + ((ss) ⋅ ((-1) / 4)) = (ss) ⋅ ((4 / 4) + ((-1) / 4)) and (4 / 4) + ((-1) / 4) = 3 / 4, then ((ss) ⋅ (4 / 4)) + ((ss) ⋅ ((-1) / 4)) = (ss) ⋅ (3 / 4)
8 (ss) + ((ss) ⋅ ((-1) / 4)) = (ss) ⋅ (3 / 4) if ((ss) ⋅ (4 / 4)) + ((ss) ⋅ ((-1) / 4)) = (ss) ⋅ (3 / 4) and ss = (ss) ⋅ (4 / 4), then (ss) + ((ss) ⋅ ((-1) / 4)) = (ss) ⋅ (3 / 4)
9 (ss) + ((ss) ⋅ ((-1) / 4)) = (ss) - ((ss) / 4) (ss) + ((ss) ⋅ ((-1) / 4)) = (ss) - ((ss) / 4)
10 (ss) - ((ss) / 4) = (ss) ⋅ (3 / 4) if (ss) + ((ss) ⋅ ((-1) / 4)) = (ss) - ((ss) / 4) and (ss) + ((ss) ⋅ ((-1) / 4)) = (ss) ⋅ (3 / 4), then (ss) - ((ss) / 4) = (ss) ⋅ (3 / 4)
11 (ss) ⋅ (3 / 4) = (3 / 4) ⋅ (ss) (ss) ⋅ (3 / 4) = (3 / 4) ⋅ (ss)
12 (ss) - ((ss) / 4) = (3 / 4) ⋅ (ss) if (ss) - ((ss) / 4) = (ss) ⋅ (3 / 4) and (ss) ⋅ (3 / 4) = (3 / 4) ⋅ (ss), then (ss) - ((ss) / 4) = (3 / 4) ⋅ (ss)

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