45=9(1+k)

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Solution for 45=9(1+k) equation: 



45=9(1+k)

We move all terms to the left:

45-(9(1+k))=0

We add all the numbers together, and all the variables

-(9(k+1))+45=0



We calculate terms in parentheses: -(9(k+1)), so:

9(k+1)

We multiply parentheses

9k+9

Back to the equation:

-(9k+9)



We get rid of parentheses

-9k-9+45=0

We add all the numbers together, and all the variables

-9k+36=0

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

-9k=-36

k=-36/-9

k=+4

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