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-28.8-b=20.8
We move all terms to the left:
-28.8-b-(20.8)=0
We add all the numbers together, and all the variables
-1b-49.6=0
We move all terms containing b to the left, all other terms to the right
-b=49.6
b=49.6/-1
b=-49+0.6/1
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