18=(-8k)-k

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Solution for 18=(-8k)-k equation: 



18=(-8k)-k

We move all terms to the left:

18-((-8k)-k)=0



We calculate terms in parentheses: -((-8k)-k), so:

(-8k)-k

We add all the numbers together, and all the variables

-1k+(-8k)

We get rid of parentheses

-1k-8k

We add all the numbers together, and all the variables

-9k

Back to the equation:

-(-9k)



We get rid of parentheses

9k+18=0

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

9k=-18

k=-18/9

k=-2

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