-7(-3x-4)=7

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Solution for -7(-3x-4)=7 equation: 



-7(-3x-4)=7

We move all terms to the left:

-7(-3x-4)-(7)=0

We multiply parentheses

21x+28-7=0

We add all the numbers together, and all the variables

21x+21=0

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

21x=-21

x=-21/21

x=-1

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