-21-x=-7(-3x+3)

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Solution for -21-x=-7(-3x+3) equation: 



-21-x=-7(-3x+3)

We move all terms to the left:

-21-x-(-7(-3x+3))=0

We add all the numbers together, and all the variables

-1x-(-7(-3x+3))-21=0



We calculate terms in parentheses: -(-7(-3x+3)), so:

-7(-3x+3)

We multiply parentheses

21x-21

Back to the equation:

-(21x-21)



We get rid of parentheses

-1x-21x+21-21=0

We add all the numbers together, and all the variables

-22x=0

x=0/-22

x=0

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