-90=-5(k+5)

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Solution for -90=-5(k+5) equation: 



-90=-5(k+5)

We move all terms to the left:

-90-(-5(k+5))=0



We calculate terms in parentheses: -(-5(k+5)), so:

-5(k+5)

We multiply parentheses

-5k-25

Back to the equation:

-(-5k-25)



We get rid of parentheses

5k+25-90=0

We add all the numbers together, and all the variables

5k-65=0

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

5k=65

k=65/5

k=13

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