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.8O+16=-0.8O+12
We move all terms to the left:
.8O+16-(-0.8O+12)=0
We get rid of parentheses
.8O+0.8O-12+16=0
We add all the numbers together, and all the variables
1.6O+4=0
We move all terms containing O to the left, all other terms to the right
1.6O=-4
O=-4/1.6
O=-2+0.8/1.6
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