16=-a-(-25)

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Solution for 16=-a-(-25) equation: 



16=-a-(-25)

We move all terms to the left:

16-(-a-(-25))=0



We calculate terms in parentheses: -(-a-(-25)), so:

-a-(-25)

We add all the numbers together, and all the variables

-1a+25

Back to the equation:

-(-1a+25)



We get rid of parentheses

1a-25+16=0

We add all the numbers together, and all the variables

a-9=0

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

a=9

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