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18s+15+9=16+16s
We move all terms to the left:
18s+15+9-(16+16s)=0
We add all the numbers together, and all the variables
18s-(16s+16)+15+9=0
We add all the numbers together, and all the variables
18s-(16s+16)+24=0
We get rid of parentheses
18s-16s-16+24=0
We add all the numbers together, and all the variables
2s+8=0
We move all terms containing s to the left, all other terms to the right
2s=-8
s=-8/2
s=-4
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