(k+9)=12

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Solution for (k+9)=12 equation: 



(k+9)=12

We move all terms to the left:

(k+9)-(12)=0

We get rid of parentheses

k+9-12=0

We add all the numbers together, and all the variables

k-3=0

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

k=3

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