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-s/3-7=2
We move all terms to the left:
-s/3-7-(2)=0
We add all the numbers together, and all the variables
-s/3-9=0
We multiply all the terms by the denominator
-s-9*3=0
We add all the numbers together, and all the variables
-1s-27=0
We move all terms containing s to the left, all other terms to the right
-s=27
s=27/-1
s=-27
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