Proof: Apply Associative Multiply

Let's prove the following theorem:

if bc = d, then (ab) ⋅ c = ad

Proof:

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Given
1 bc = d
Proof Table
# Claim Reason
1 (ab) ⋅ c = a ⋅ (bc) (ab) ⋅ c = a ⋅ (bc)
2 a ⋅ (bc) = ad if bc = d, then a ⋅ (bc) = ad
3 (ab) ⋅ c = ad if (ab) ⋅ c = a ⋅ (bc) and a ⋅ (bc) = ad, then (ab) ⋅ c = ad

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