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1.2s+2s+4=-4.8
We move all terms to the left:
1.2s+2s+4-(-4.8)=0
We add all the numbers together, and all the variables
3.2s+8.8=0
We move all terms containing s to the left, all other terms to the right
3.2s=-8.8
s=-8.8/3.2
s=-2+2.4/3.2
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