(k-3)9=81

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Solution for (k-3)9=81 equation: 



(k-3)9=81

We move all terms to the left:

(k-3)9-(81)=0

We multiply parentheses

9k-27-81=0

We add all the numbers together, and all the variables

9k-108=0

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

9k=108

k=108/9

k=12

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