-20=-8+-2k

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Solution for -20=-8+-2k equation: 



-20=-8+-2k

We move all terms to the left:

-20-(-8+-2k)=0

We add all the numbers together, and all the variables

-(-2k)-20=0

We get rid of parentheses

2k-20=0

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

2k=20

k=20/2

k=10

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