-3=1+-2s

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Solution for -3=1+-2s equation: 



-3=1+-2s

We move all terms to the left:

-3-(1+-2s)=0

We add all the numbers together, and all the variables

-(-2s)-3=0

We get rid of parentheses

2s-3=0

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

2s=3

s=3/2

s=1+1/2

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