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-2.9+b/0.1=39.9
We move all terms to the left:
-2.9+b/0.1-(39.9)=0
We add all the numbers together, and all the variables
b/0.1-42.8=0
We multiply all the terms by the denominator
b-(42.8)*0.1=0
We add all the numbers together, and all the variables
b-4.28=0
We move all terms containing b to the left, all other terms to the right
b=4.28
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