90=-2k-8(k-5)

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Solution for 90=-2k-8(k-5) equation: 



90=-2k-8(k-5)

We move all terms to the left:

90-(-2k-8(k-5))=0



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

-2k-8(k-5)

We multiply parentheses

-2k-8k+40

We add all the numbers together, and all the variables

-10k+40

Back to the equation:

-(-10k+40)



We get rid of parentheses

10k-40+90=0

We add all the numbers together, and all the variables

10k+50=0

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

10k=-50

k=-50/10

k=-5

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