-12=-3(-3+x)

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Solution for -12=-3(-3+x) equation: 



-12=-3(-3+x)

We move all terms to the left:

-12-(-3(-3+x))=0

We add all the numbers together, and all the variables

-(-3(x-3))-12=0



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

-3(x-3)

We multiply parentheses

-3x+9

Back to the equation:

-(-3x+9)



We get rid of parentheses

3x-9-12=0

We add all the numbers together, and all the variables

3x-21=0

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

3x=21

x=21/3

x=7

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