12x-3x+9x=54

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Solution for 12x-3x+9x=54 equation: 



12x-3x+9x=54

We move all terms to the left:

12x-3x+9x-(54)=0

We add all the numbers together, and all the variables

18x-54=0

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

18x=54

x=54/18

x=3

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