-(-a)=

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Solution for -(-a)= equation: 


Simplifying
-1(-1a) = 0

Remove parenthesis around (-1a)
-1 * -1a = 0

Multiply -1 * -1
1a = 0

Solving
1a = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Divide each side by '1'.
a = 0

Simplifying
a = 0

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