12-9x=31

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Solution for 12-9x=31 equation: 



12-9x=31

We move all terms to the left:

12-9x-(31)=0

We add all the numbers together, and all the variables

-9x-19=0

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

-9x=19

x=19/-9

x=-2+1/9

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