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b-0.2b=0.3
We move all terms to the left:
b-0.2b-(0.3)=0
We add all the numbers together, and all the variables
0.8b-0.3=0
We move all terms containing b to the left, all other terms to the right
0.8b=0.3
b=0.3/0.8
b=0.3/0.8
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