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.15O=2.7
We move all terms to the left:
.15O-(2.7)=0
We add all the numbers together, and all the variables
.15O-2.7=0
We move all terms containing O to the left, all other terms to the right
.15O=2.7
O=2.7/.15
O=18+4.4408920985E-16/.15
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