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2s-8=12.
We move all terms to the left:
2s-8-(12.)=0
We add all the numbers together, and all the variables
2s-8-12=0
We add all the numbers together, and all the variables
2s-20=0
We move all terms containing s to the left, all other terms to the right
2s=20
s=20/2
s=10
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