12=x+8+3x

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Solution for 12=x+8+3x equation: 



12=x+8+3x

We move all terms to the left:

12-(x+8+3x)=0

We add all the numbers together, and all the variables

-(4x+8)+12=0

We get rid of parentheses

-4x-8+12=0

We add all the numbers together, and all the variables

-4x+4=0

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

-4x=-4

x=-4/-4

x=1

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