-7(-3+7x)=21

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



-7(-3+7x)=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-49x+21-21=0

We add all the numbers together, and all the variables

-49x=0

x=0/-49

x=0

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