-86=7k-9

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Solution for -86=7k-9 equation: 



-86=7k-9

We move all terms to the left:

-86-(7k-9)=0

We get rid of parentheses

-7k+9-86=0

We add all the numbers together, and all the variables

-7k-77=0

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

-7k=77

k=77/-7

k=-11

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