12+x=12+3x

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



12+x=12+3x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

x-3x-12+12=0

We add all the numbers together, and all the variables

-2x=0

x=0/-2

x=0

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