The people on yahoo answers confused me ...and said I was doing it wrong(adsbygoogle = window.adsbygoogle || []).push({});

When you do algebra...you're supposed to think about it in terms of an additive inverse

(as multiplying by (-1) and adding it ) so you get communitivity and associativity, right?

Is that how you think of it -in terms of addition when doing algebra?

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# How do you think about Subtraction?

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