-3(2+7k)=57

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Solution for -3(2+7k)=57 equation: 



-3(2+7k)=57

We move all terms to the left:

-3(2+7k)-(57)=0

We add all the numbers together, and all the variables

-3(7k+2)-57=0

We multiply parentheses

-21k-6-57=0

We add all the numbers together, and all the variables

-21k-63=0

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

-21k=63

k=63/-21

k=-3

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