Proof: Distributive Property Variation 3

Let's prove the following theorem:

(a + b) ⋅ c = (ac) + (bc)

Proof:

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Proof Table
# Claim Reason
1 (a + b) ⋅ c = (ca) + (cb) (a + b) ⋅ c = (ca) + (cb)
2 ca = ac ca = ac
3 cb = bc cb = bc
4 (ca) + (cb) = (ac) + (bc) if ca = ac and cb = bc, then (ca) + (cb) = (ac) + (bc)
5 (a + b) ⋅ c = (ac) + (bc) if (a + b) ⋅ c = (ca) + (cb) and (ca) + (cb) = (ac) + (bc), then (a + b) ⋅ c = (ac) + (bc)
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