a=-(a)

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Solution for a=-(a) equation: 



a=-(a)

We move all terms to the left:

a-(-(a))=0

We add all the numbers together, and all the variables

a-(-1a)=0

We get rid of parentheses

a+1a=0

We add all the numbers together, and all the variables

2a=0

a=0/2

a=0

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