-9(10+k)=9

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Solution for -9(10+k)=9 equation: 



-9(10+k)=9

We move all terms to the left:

-9(10+k)-(9)=0

We add all the numbers together, and all the variables

-9(k+10)-9=0

We multiply parentheses

-9k-90-9=0

We add all the numbers together, and all the variables

-9k-99=0

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

-9k=99

k=99/-9

k=-11

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