9=-k-4(-2k+10)

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Solution for 9=-k-4(-2k+10) equation: 



9=-k-4(-2k+10)

We move all terms to the left:

9-(-k-4(-2k+10))=0



We calculate terms in parentheses: -(-k-4(-2k+10)), so:

-k-4(-2k+10)

We add all the numbers together, and all the variables

-1k-4(-2k+10)

We multiply parentheses

-1k+8k-40

We add all the numbers together, and all the variables

7k-40

Back to the equation:

-(7k-40)



We get rid of parentheses

-7k+40+9=0

We add all the numbers together, and all the variables

-7k+49=0

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

-7k=-49

k=-49/-7

k=+7

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