(12)-2x=81

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Solution for (12)-2x=81 equation: 



(12)-2x=81

We move all terms to the left:

(12)-2x-(81)=0

We add all the numbers together, and all the variables

-2x-69=0

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

-2x=69

x=69/-2

x=-34+1/2

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