Algebra 5

Proof: Algebra 5

Let's prove the following theorem:

if a + b = 180 - 90, then a + b = 90

Proof:

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Given
1 a + b = 180 - 90
Proof Table
# Claim Reason
1 180 - 90 = 90 180 - 90 = 90
2 a + b = 90 if 180 - 90 = 90 and a + b = 180 - 90, then a + b = 90

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