Subtraction Example
Subtract Substitute
Simplify3

Proof: Simplify3

Let's prove the following theorem:

((x ⋅ 4) ⋅ 2) - (2 ⋅ 2) = ((x ⋅ 4) ⋅ 2) - 4

Proof:

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Proof Table
# Claim Reason
1 2 ⋅ 2 = 4 2 ⋅ 2 = 4
2 ((x ⋅ 4) ⋅ 2) - (2 ⋅ 2) = ((x ⋅ 4) ⋅ 2) - 4 if 2 ⋅ 2 = 4, then ((x ⋅ 4) ⋅ 2) - (2 ⋅ 2) = ((x ⋅ 4) ⋅ 2) - 4
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