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s+21=2(11s)
We move all terms to the left:
s+21-(2(11s))=0
determiningTheFunctionDomain s-211s+21=0
We add all the numbers together, and all the variables
-210s+21=0
We move all terms containing s to the left, all other terms to the right
-210s=-21
s=-21/-210
s=1/10
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