-x-12x=9

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Solution for -x-12x=9 equation: 



-x-12x=9

We move all terms to the left:

-x-12x-(9)=0

We add all the numbers together, and all the variables

-13x-9=0

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

-13x=9

x=9/-13

x=-9/13

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