12=3(1-x)

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



12=3(1-x)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



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

3(-1x+1)

We multiply parentheses

-3x+3

Back to the equation:

-(-3x+3)



We get rid of parentheses

3x-3+12=0

We add all the numbers together, and all the variables

3x+9=0

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

3x=-9

x=-9/3

x=-3

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