9=-3(k+3)

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



9=-3(k+3)

We move all terms to the left:

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



We calculate terms in parentheses: -(-3(k+3)), so:

-3(k+3)

We multiply parentheses

-3k-9

Back to the equation:

-(-3k-9)



We get rid of parentheses

3k+9+9=0

We add all the numbers together, and all the variables

3k+18=0

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

3k=-18

k=-18/3

k=-6

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