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.8O+0.2=0.3-0.1O
We move all terms to the left:
.8O+0.2-(0.3-0.1O)=0
We add all the numbers together, and all the variables
.8O-(-0.1O+0.3)+0.2=0
We get rid of parentheses
.8O+0.1O-0.3+0.2=0
We add all the numbers together, and all the variables
0.9O-0.1=0
We move all terms containing O to the left, all other terms to the right
0.9O=0.1
O=0.1/0.9
O=0.1/0.9
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