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5s-3-8s+2=21-0
We move all terms to the left:
5s-3-8s+2-(21-0)=0
We add all the numbers together, and all the variables
5s-8s-3+2-21=0
We add all the numbers together, and all the variables
-3s-22=0
We move all terms containing s to the left, all other terms to the right
-3s=22
s=22/-3
s=-7+1/3
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