9=-8(5+5k)-(7k-2)

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Solution for 9=-8(5+5k)-(7k-2) equation: 



9=-8(5+5k)-(7k-2)

We move all terms to the left:

9-(-8(5+5k)-(7k-2))=0

We add all the numbers together, and all the variables

-(-8(5k+5)-(7k-2))+9=0



We calculate terms in parentheses: -(-8(5k+5)-(7k-2)), so:

-8(5k+5)-(7k-2)

We multiply parentheses

-40k-(7k-2)-40

We get rid of parentheses

-40k-7k+2-40

We add all the numbers together, and all the variables

-47k-38

Back to the equation:

-(-47k-38)



We get rid of parentheses

47k+38+9=0

We add all the numbers together, and all the variables

47k+47=0

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

47k=-47

k=-47/47

k=-1

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