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4s+-2.5=-16.1
We move all terms to the left:
4s+-2.5-(-16.1)=0
We add all the numbers together, and all the variables
4s+13.6=0
We move all terms containing s to the left, all other terms to the right
4s=-13.6
s=-13.6/4
s=-3+1/2.5
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