3(7-7x)=21

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



3(7-7x)=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-21x+21-21=0

We add all the numbers together, and all the variables

-21x=0

x=0/-21

x=0

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