9-7k=21k-8

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Solution for 9-7k=21k-8 equation: 



9-7k=21k-8

We move all terms to the left:

9-7k-(21k-8)=0

We get rid of parentheses

-7k-21k+8+9=0

We add all the numbers together, and all the variables

-28k+17=0

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

-28k=-17

k=-17/-28

k=17/28

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