Proof: Apply Associative Multiply

Let's prove the following theorem:

if b ⋅ c = d, then (a ⋅ b) ⋅ c = a ⋅ d

Proof:

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

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