-1+-2s=-7

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Solution for -1+-2s=-7 equation: 



-1+-2s=-7

We move all terms to the left:

-1+-2s-(-7)=0

We add all the numbers together, and all the variables

-2s+6=0

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

-2s=-6

s=-6/-2

s=+3

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