0.9=k(0.1)

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Solution for 0.9=k(0.1) equation: 



0.9=k(0.1)

We move all terms to the left:

0.9-(k(0.1))=0



We calculate terms in parentheses: -(k(0.1)), so:

k(0.1)

We multiply parentheses

0.1k

Back to the equation:

-(0.1k)



We add all the numbers together, and all the variables

-(+0.1k)+0.9=0

We get rid of parentheses

-0.1k+0.9=0

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

-0.1k=-0.9

k=-0.9/-0.1

k=+9

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