-2s=-9-s

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Solution for -2s=-9-s equation: 



-2s=-9-s

We move all terms to the left:

-2s-(-9-s)=0

We add all the numbers together, and all the variables

-2s-(-1s-9)=0

We get rid of parentheses

-2s+1s+9=0

We add all the numbers together, and all the variables

-1s+9=0

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

-s=-9

s=-9/-1

s=+9

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