-2+9=-s

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Solution for -2+9=-s equation: 



-2+9=-s

We move all terms to the left:

-2+9-(-s)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

-(-1s)+7=0

We get rid of parentheses

1s+7=0

We add all the numbers together, and all the variables

s+7=0

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

s=-7

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