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3s+71.83=7.99
We move all terms to the left:
3s+71.83-(7.99)=0
We add all the numbers together, and all the variables
3s+63.84=0
We move all terms containing s to the left, all other terms to the right
3s=-63.84
s=-63.84/3
s=-21+0.84/3
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