3(-x-4)=21

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Solution for 3(-x-4)=21 equation: 



3(-x-4)=21

We move all terms to the left:

3(-x-4)-(21)=0

We add all the numbers together, and all the variables

3(-1x-4)-21=0

We multiply parentheses

-3x-12-21=0

We add all the numbers together, and all the variables

-3x-33=0

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

-3x=33

x=33/-3

x=-11

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