-13s+20=-1-20s

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Solution for -13s+20=-1-20s equation: 



-13s+20=-1-20s

We move all terms to the left:

-13s+20-(-1-20s)=0

We add all the numbers together, and all the variables

-13s-(-20s-1)+20=0

We get rid of parentheses

-13s+20s+1+20=0

We add all the numbers together, and all the variables

7s+21=0

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

7s=-21

s=-21/7

s=-3

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