-7(6+k)=21

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Solution for -7(6+k)=21 equation: 



-7(6+k)=21

We move all terms to the left:

-7(6+k)-(21)=0

We add all the numbers together, and all the variables

-7(k+6)-21=0

We multiply parentheses

-7k-42-21=0

We add all the numbers together, and all the variables

-7k-63=0

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

-7k=63

k=63/-7

k=-9

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