30=-3(7k+8)

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Solution for 30=-3(7k+8) equation: 



30=-3(7k+8)

We move all terms to the left:

30-(-3(7k+8))=0



We calculate terms in parentheses: -(-3(7k+8)), so:

-3(7k+8)

We multiply parentheses

-21k-24

Back to the equation:

-(-21k-24)



We get rid of parentheses

21k+24+30=0

We add all the numbers together, and all the variables

21k+54=0

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

21k=-54

k=-54/21

k=-2+4/7

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