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7=s+2.75
We move all terms to the left:
7-(s+2.75)=0
We get rid of parentheses
-s-2.75+7=0
We add all the numbers together, and all the variables
-1s+4.25=0
We move all terms containing s to the left, all other terms to the right
-s=-4.25
s=-4.25/-1
s=4+0.25/1
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