k=-2(k-9)

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Solution for k=-2(k-9) equation: 



k=-2(k-9)

We move all terms to the left:

k-(-2(k-9))=0



We calculate terms in parentheses: -(-2(k-9)), so:

-2(k-9)

We multiply parentheses

-2k+18

Back to the equation:

-(-2k+18)



We get rid of parentheses

k+2k-18=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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