3+12=3x-12

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Solution for 3+12=3x-12 equation: 



3+12=3x-12

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(3x-12)+15=0

We get rid of parentheses

-3x+12+15=0

We add all the numbers together, and all the variables

-3x+27=0

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

-3x=-27

x=-27/-3

x=+9

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