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2(s+6)+2(s+s)+2s=102
We move all terms to the left:
2(s+6)+2(s+s)+2s-(102)=0
We add all the numbers together, and all the variables
2(s+6)+2(+2s)+2s-102=0
We add all the numbers together, and all the variables
2s+2(s+6)+2(+2s)-102=0
We multiply parentheses
2s+2s+4s+12-102=0
We add all the numbers together, and all the variables
8s-90=0
We move all terms containing s to the left, all other terms to the right
8s=90
s=90/8
s=11+1/4
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