18s=-9(-7s+15)

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Solution for 18s=-9(-7s+15) equation: 



18s=-9(-7s+15)

We move all terms to the left:

18s-(-9(-7s+15))=0



We calculate terms in parentheses: -(-9(-7s+15)), so:

-9(-7s+15)

We multiply parentheses

63s-135

Back to the equation:

-(63s-135)



We get rid of parentheses

18s-63s+135=0

We add all the numbers together, and all the variables

-45s+135=0

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

-45s=-135

s=-135/-45

s=+3

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