90=(20k+)+(33k-9)

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Solution for 90=(20k+)+(33k-9) equation: 



90=(20k+)+(33k-9)

We move all terms to the left:

90-((20k+)+(33k-9))=0

We add all the numbers together, and all the variables

-((+20k)+(33k-9))+90=0



We calculate terms in parentheses: -((+20k)+(33k-9)), so:

(+20k)+(33k-9)

We get rid of parentheses

20k+33k-9

We add all the numbers together, and all the variables

53k-9

Back to the equation:

-(53k-9)



We get rid of parentheses

-53k+9+90=0

We add all the numbers together, and all the variables

-53k+99=0

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

-53k=-99

k=-99/-53

k=1+46/53

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