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12.3=0.41b
We move all terms to the left:
12.3-(0.41b)=0
We add all the numbers together, and all the variables
-(+0.41b)+12.3=0
We get rid of parentheses
-0.41b+12.3=0
We move all terms containing b to the left, all other terms to the right
-0.41b=-12.3
b=-12.3/-0.41
b=30+1.7763568394E-15/0.41
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