12x-9=-129

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Solution for 12x-9=-129 equation: 



12x-9=-129

We move all terms to the left:

12x-9-(-129)=0

We add all the numbers together, and all the variables

12x+120=0

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

12x=-120

x=-120/12

x=-10

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