-9x-3x+8-12=20

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Solution for -9x-3x+8-12=20 equation: 



-9x-3x+8-12=20

We move all terms to the left:

-9x-3x+8-12-(20)=0

We add all the numbers together, and all the variables

-12x-24=0

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

-12x=24

x=24/-12

x=-2

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