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80=s/30.40
We move all terms to the left:
80-(s/30.40)=0
We add all the numbers together, and all the variables
-(+s/30.40)+80=0
We get rid of parentheses
-s/30.40+80=0
We multiply all the terms by the denominator
-s+80*30.40=0
We add all the numbers together, and all the variables
-1s+2432=0
We move all terms containing s to the left, all other terms to the right
-s=-2432
s=-2432/-1
s=+2432
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