18=2(s+15)

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Solution for 18=2(s+15) equation: 



18=2(s+15)

We move all terms to the left:

18-(2(s+15))=0



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

2(s+15)

We multiply parentheses

2s+30

Back to the equation:

-(2s+30)



We get rid of parentheses

-2s-30+18=0

We add all the numbers together, and all the variables

-2s-12=0

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

-2s=12

s=12/-2

s=-6

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