9(k-3)=90

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Solution for 9(k-3)=90 equation: 



9(k-3)=90

We move all terms to the left:

9(k-3)-(90)=0

We multiply parentheses

9k-27-90=0

We add all the numbers together, and all the variables

9k-117=0

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

9k=117

k=117/9

k=13

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