8k=k+-9

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Solution for 8k=k+-9 equation: 



8k=k+-9

We move all terms to the left:

8k-(k+-9)=0

We add all the numbers together, and all the variables

8k-(k-9)=0

We get rid of parentheses

8k-k+9=0

We add all the numbers together, and all the variables

7k+9=0

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

7k=-9

k=-9/7

k=-1+2/7

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