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19s-17s-(-8s)2=18
We move all terms to the left:
19s-17s-(-8s)2-(18)=0
We add all the numbers together, and all the variables
2s-(-8s)2-18=0
We multiply parentheses
2s+16s-18=0
We add all the numbers together, and all the variables
18s-18=0
We move all terms containing s to the left, all other terms to the right
18s=18
s=18/18
s=1
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