9=-8s-(-7)

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Solution for 9=-8s-(-7) equation: 



9=-8s-(-7)

We move all terms to the left:

9-(-8s-(-7))=0



We calculate terms in parentheses: -(-8s-(-7)), so:

-8s-(-7)

We add all the numbers together, and all the variables

-8s+7

Back to the equation:

-(-8s+7)



We get rid of parentheses

8s-7+9=0

We add all the numbers together, and all the variables

8s+2=0

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

8s=-2

s=-2/8

s=-1/4

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