-20=k(-4)

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Solution for -20=k(-4) equation: 



-20=k(-4)

We move all terms to the left:

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



We calculate terms in parentheses: -(k(-4)), so:

k(-4)

We multiply parentheses

-4k

Back to the equation:

-(-4k)



We get rid of parentheses

4k-20=0

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

4k=20

k=20/4

k=5

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