-8-7k=-9k

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



-8-7k=-9k

We move all terms to the left:

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

We get rid of parentheses

-7k+9k-8=0

We add all the numbers together, and all the variables

2k-8=0

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

2k=8

k=8/2

k=4

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