-21=3x-3(3x-11)

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Solution for -21=3x-3(3x-11) equation: 



-21=3x-3(3x-11)

We move all terms to the left:

-21-(3x-3(3x-11))=0



We calculate terms in parentheses: -(3x-3(3x-11)), so:

3x-3(3x-11)

We multiply parentheses

3x-9x+33

We add all the numbers together, and all the variables

-6x+33

Back to the equation:

-(-6x+33)



We get rid of parentheses

6x-33-21=0

We add all the numbers together, and all the variables

6x-54=0

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

6x=54

x=54/6

x=9

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