-3k+9=81+6k

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Solution for -3k+9=81+6k equation: 



-3k+9=81+6k

We move all terms to the left:

-3k+9-(81+6k)=0

We add all the numbers together, and all the variables

-3k-(6k+81)+9=0

We get rid of parentheses

-3k-6k-81+9=0

We add all the numbers together, and all the variables

-9k-72=0

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

-9k=72

k=72/-9

k=-8

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