-12=3(7+x)

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Solution for -12=3(7+x) equation: 



-12=3(7+x)

We move all terms to the left:

-12-(3(7+x))=0

We add all the numbers together, and all the variables

-(3(x+7))-12=0



We calculate terms in parentheses: -(3(x+7)), so:

3(x+7)

We multiply parentheses

3x+21

Back to the equation:

-(3x+21)



We get rid of parentheses

-3x-21-12=0

We add all the numbers together, and all the variables

-3x-33=0

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

-3x=33

x=33/-3

x=-11

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