12+x=-3(1-2x)

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Solution for 12+x=-3(1-2x) equation: 



12+x=-3(1-2x)

We move all terms to the left:

12+x-(-3(1-2x))=0

We add all the numbers together, and all the variables

x-(-3(-2x+1))+12=0



We calculate terms in parentheses: -(-3(-2x+1)), so:

-3(-2x+1)

We multiply parentheses

6x-3

Back to the equation:

-(6x-3)



We get rid of parentheses

x-6x+3+12=0

We add all the numbers together, and all the variables

-5x+15=0

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

-5x=-15

x=-15/-5

x=+3

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