Proof: Multiply by 1

Let's prove the following theorem:

if a = b ⋅ 1, then a = b

Proof:

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

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