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7=s+3.50
We move all terms to the left:
7-(s+3.50)=0
We add all the numbers together, and all the variables
-(s+3.5)+7=0
We get rid of parentheses
-s-3.5+7=0
We add all the numbers together, and all the variables
-1s+3.5=0
We move all terms containing s to the left, all other terms to the right
-s=-3.5
s=-3.5/-1
s=3+0.5/1
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