3(k-9)=12

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Solution for 3(k-9)=12 equation: 



3(k-9)=12

We move all terms to the left:

3(k-9)-(12)=0

We multiply parentheses

3k-27-12=0

We add all the numbers together, and all the variables

3k-39=0

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

3k=39

k=39/3

k=13

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