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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