12=-3(4-x)

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Solution for 12=-3(4-x) equation: 



12=-3(4-x)

We move all terms to the left:

12-(-3(4-x))=0

We add all the numbers together, and all the variables

-(-3(-1x+4))+12=0



We calculate terms in parentheses: -(-3(-1x+4)), so:

-3(-1x+4)

We multiply parentheses

3x-12

Back to the equation:

-(3x-12)



We get rid of parentheses

-3x+12+12=0

We add all the numbers together, and all the variables

-3x+24=0

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

-3x=-24

x=-24/-3

x=+8

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