-s/2=9

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Solution for -s/2=9 equation: 



-s/2=9

We move all terms to the left:

-s/2-(9)=0

We multiply all the terms by the denominator


-s-9*2=0

We add all the numbers together, and all the variables

-1s-18=0

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

-s=18

s=18/-1

s=-18

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