3x+4x+12=4x

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



3x+4x+12=4x

We move all terms to the left:

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

We add all the numbers together, and all the variables

3x+12=0

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

3x=-12

x=-12/3

x=-4

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