3x-3(2x+2)=21

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Solution for 3x-3(2x+2)=21 equation: 



3x-3(2x+2)=21

We move all terms to the left:

3x-3(2x+2)-(21)=0

We multiply parentheses

3x-6x-6-21=0

We add all the numbers together, and all the variables

-3x-27=0

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

-3x=27

x=27/-3

x=-9

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