12x+3x=4x.

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Solution for 12x+3x=4x. equation: 



12x+3x=4x.

We move all terms to the left:

12x+3x-(4x.)=0

We add all the numbers together, and all the variables

12x+3x-(+4x.)=0

We add all the numbers together, and all the variables

15x-(+4x.)=0

We get rid of parentheses

15x-4x.=0

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