-12=3(x+1)

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



-12=3(x+1)

We move all terms to the left:

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



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

3(x+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-15=0

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

-3x=15

x=15/-3

x=-5

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