-12=6+3x

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Solution for -12=6+3x equation: 



-12=6+3x

We move all terms to the left:

-12-(6+3x)=0

We add all the numbers together, and all the variables

-(3x+6)-12=0

We get rid of parentheses

-3x-6-12=0

We add all the numbers together, and all the variables

-3x-18=0

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

-3x=18

x=18/-3

x=-6

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