-20=-4+8k

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Solution for -20=-4+8k equation: 



-20=-4+8k

We move all terms to the left:

-20-(-4+8k)=0

We add all the numbers together, and all the variables

-(8k-4)-20=0

We get rid of parentheses

-8k+4-20=0

We add all the numbers together, and all the variables

-8k-16=0

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

-8k=16

k=16/-8

k=-2

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