Proof: Zero Plus a

Let's prove the following theorem:

0 + a = a

Proof:

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Proof Table
# Claim Reason
1 a + 0 = a a + 0 = a
2 0 + a = a + 0 0 + a = a + 0
3 0 + a = a if 0 + a = a + 0 and a + 0 = a, then 0 + a = a

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