-3(-7+4x)=57

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Solution for -3(-7+4x)=57 equation: 



-3(-7+4x)=57

We move all terms to the left:

-3(-7+4x)-(57)=0

We add all the numbers together, and all the variables

-3(4x-7)-57=0

We multiply parentheses

-12x+21-57=0

We add all the numbers together, and all the variables

-12x-36=0

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

-12x=36

x=36/-12

x=-3

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