-2k+9=-9+k

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Solution for -2k+9=-9+k equation: 



-2k+9=-9+k

We move all terms to the left:

-2k+9-(-9+k)=0

We add all the numbers together, and all the variables

-2k-(k-9)+9=0

We get rid of parentheses

-2k-k+9+9=0

We add all the numbers together, and all the variables

-3k+18=0

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

-3k=-18

k=-18/-3

k=+6

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