-3(-1+-x)=-12

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Solution for -3(-1+-x)=-12 equation: 



-3(-1+-x)=-12

We move all terms to the left:

-3(-1+-x)-(-12)=0

We add all the numbers together, and all the variables

-3(-1x)-(-12)=0

We add all the numbers together, and all the variables

-3(-1x)+12=0

We multiply parentheses

3x+12=0

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

3x=-12

x=-12/3

x=-4

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