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4.25+3s=20.81
We move all terms to the left:
4.25+3s-(20.81)=0
We add all the numbers together, and all the variables
3s-16.56=0
We move all terms containing s to the left, all other terms to the right
3s=16.56
s=16.56/3
s=5+1/1.9230769230769
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