129=-3(-7k-6)

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Solution for 129=-3(-7k-6) equation: 



129=-3(-7k-6)

We move all terms to the left:

129-(-3(-7k-6))=0



We calculate terms in parentheses: -(-3(-7k-6)), so:

-3(-7k-6)

We multiply parentheses

21k+18

Back to the equation:

-(21k+18)



We get rid of parentheses

-21k-18+129=0

We add all the numbers together, and all the variables

-21k+111=0

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

-21k=-111

k=-111/-21

k=5+2/7

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