-3x+12+9x=54

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



-3x+12+9x=54

We move all terms to the left:

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

We add all the numbers together, and all the variables

6x-42=0

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

6x=42

x=42/6

x=7

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