Compute 1

Proof: Compute 1

Let's prove the following theorem:

if a = 90 - 67, then a = 23

Proof:

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Given
1 a = 90 - 67
Proof Table
# Claim Reason
1 90 - 67 = 23 90 - 67 = 23
2 a = 23 if 90 - 67 = 23 and a = 90 - 67, then a = 23

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