-3(x-0)=21

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Solution for -3(x-0)=21 equation: 



-3(x-0)=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

-3(+x)-21=0

We multiply parentheses

-3x-21=0

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

-3x=21

x=21/-3

x=-7

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