-12=x.3

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Solution for -12=x.3 equation: 



-12=x.3

We move all terms to the left:

-12-(x.3)=0

We add all the numbers together, and all the variables

-(+x.3)-12=0

We get rid of parentheses

-x.3-12=0

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

-x.3=12

x=12/1

x=12

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