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39.7+b30.1=165.288
We move all terms to the left:
39.7+b30.1-(165.288)=0
We add all the numbers together, and all the variables
b30.1-125.588=0
We move all terms containing b to the left, all other terms to the right
b30.1=125.588
b=125.588/1
b=125.588
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