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Inverse, Commutative, and Associative Laws Assignment | Assignment Help Services

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September 9th, 2019

How do you prove this If you add (a+b) to both sides, you can use inverse, commutative, and associative laws to show that both sides are equal and then use the cancellation law to finish the proof.

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The goal is to prove -(a+b)=(-a)+(-b) this is Lemma 2.3.2(4)

But I need to solve it using methods above

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