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8.55=s+2.79
We move all terms to the left:
8.55-(s+2.79)=0
We get rid of parentheses
-s-2.79+8.55=0
We add all the numbers together, and all the variables
-1s+5.76=0
We move all terms containing s to the left, all other terms to the right
-s=-5.76
s=-5.76/-1
s=5+0.76/1
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