-3(-7-6x)=21

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Solution for -3(-7-6x)=21 equation: 



-3(-7-6x)=21

We move all terms to the left:

-3(-7-6x)-(21)=0

We add all the numbers together, and all the variables

-3(-6x-7)-21=0

We multiply parentheses

18x+21-21=0

We add all the numbers together, and all the variables

18x=0

x=0/18

x=0

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