9=8k-5k

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Solution for 9=8k-5k equation: 



9=8k-5k

We move all terms to the left:

9-(8k-5k)=0

We add all the numbers together, and all the variables

-(+3k)+9=0

We get rid of parentheses

-3k+9=0

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

-3k=-9

k=-9/-3

k=+3

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