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+1)+3=0

We get rid of parentheses

2s-1+3=0

We add all the numbers together, and all the variables

2s+2=0

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

2s=-2

s=-2/2

s=-1

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