Proof: Multiply by One 2

Let's prove the following theorem:

if the following are true:
  • a ⋅ b = c
  • d = b

then a ⋅ d = c

Proof:

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

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