-7(3+3x)=21

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



-7(3+3x)=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-21x-21-21=0

We add all the numbers together, and all the variables

-21x-42=0

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

-21x=42

x=42/-21

x=-2

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