-10=10(k-9Z)

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Solution for -10=10(k-9Z) equation: 



-10=10(k-9)

We move all terms to the left:

-10-(10(k-9))=0



We calculate terms in parentheses: -(10(k-9)), so:

10(k-9)

We multiply parentheses

10k-90

Back to the equation:

-(10k-90)



We get rid of parentheses

-10k+90-10=0

We add all the numbers together, and all the variables

-10k+80=0

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

-10k=-80

k=-80/-10

k=+8

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