8=k+2+7

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Solution for 8=k+2+7 equation: 



8=k+2+7

We move all terms to the left:

8-(k+2+7)=0

We add all the numbers together, and all the variables

-(k+9)+8=0

We get rid of parentheses

-k-9+8=0

We add all the numbers together, and all the variables

-1k-1=0

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

-k=1

k=1/-1

k=-1

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