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5200=2520-s
We move all terms to the left:
5200-(2520-s)=0
We add all the numbers together, and all the variables
-(-1s+2520)+5200=0
We get rid of parentheses
1s-2520+5200=0
We add all the numbers together, and all the variables
s+2680=0
We move all terms containing s to the left, all other terms to the right
s=-2680
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