-(-a)=-20

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Solution for -(-a)=-20 equation: 



-(-a)=-20

We move all terms to the left:

-(-a)-(-20)=0

We add all the numbers together, and all the variables

-(-1a)-(-20)=0

We add all the numbers together, and all the variables

-(-1a)+20=0

We get rid of parentheses

1a+20=0

We add all the numbers together, and all the variables

a+20=0

We move all terms containing a to the left, all other terms to the right

a=-20

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