x+12=3x.

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Solution for x+12=3x. equation: 



x+12=3x.

We move all terms to the left:

x+12-(3x.)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

x-3x.+12=0

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

x-3x.=-12

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