-s+20=3s-20

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Solution for -s+20=3s-20 equation: 



-s+20=3s-20

We move all terms to the left:

-s+20-(3s-20)=0

We add all the numbers together, and all the variables

-1s-(3s-20)+20=0

We get rid of parentheses

-1s-3s+20+20=0

We add all the numbers together, and all the variables

-4s+40=0

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

-4s=-40

s=-40/-4

s=+10

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