-a+(-(-a))=0

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Solution for -a+(-(-a))=0 equation: 



-a+(-(-a))=0

We add all the numbers together, and all the variables

-a+(-(-1a))=0

We add all the numbers together, and all the variables

-1a+(-(-1a))=0



We calculate terms in parentheses: +(-(-1a)), so:

-(-1a)

We get rid of parentheses

a

Back to the equation:

+(a)



We add all the numbers together, and all the variables

=0

a=0/1

a=0

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