90=2(k+15)

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Solution for 90=2(k+15) equation: 



90=2(k+15)

We move all terms to the left:

90-(2(k+15))=0



We calculate terms in parentheses: -(2(k+15)), so:

2(k+15)

We multiply parentheses

2k+30

Back to the equation:

-(2k+30)



We get rid of parentheses

-2k-30+90=0

We add all the numbers together, and all the variables

-2k+60=0

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

-2k=-60

k=-60/-2

k=+30

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