-81=-3(-8-5k)

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Solution for -81=-3(-8-5k) equation: 



-81=-3(-8-5k)

We move all terms to the left:

-81-(-3(-8-5k))=0

We add all the numbers together, and all the variables

-(-3(-5k-8))-81=0



We calculate terms in parentheses: -(-3(-5k-8)), so:

-3(-5k-8)

We multiply parentheses

15k+24

Back to the equation:

-(15k+24)



We get rid of parentheses

-15k-24-81=0

We add all the numbers together, and all the variables

-15k-105=0

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

-15k=105

k=105/-15

k=-7

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