9=9-(-3x)

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Solution for 9=9-(-3x) equation: 



9=9-(-3x)

We move all terms to the left:

9-(9-(-3x))=0



We calculate terms in parentheses: -(9-(-3x)), so:

9-(-3x)

determiningTheFunctionDomain
-(-3x)+9

We get rid of parentheses

3x+9

Back to the equation:

-(3x+9)



We get rid of parentheses

-3x-9+9=0

We add all the numbers together, and all the variables

-3x=0

x=0/-3

x=0

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