k=9-2k

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Solution for k=9-2k equation: 



k=9-2k

We move all terms to the left:

k-(9-2k)=0

We add all the numbers together, and all the variables

k-(-2k+9)=0

We get rid of parentheses

k+2k-9=0

We add all the numbers together, and all the variables

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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