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31.9=1.1b
We move all terms to the left:
31.9-(1.1b)=0
We add all the numbers together, and all the variables
-(+1.1b)+31.9=0
We get rid of parentheses
-1.1b+31.9=0
We move all terms containing b to the left, all other terms to the right
-1.1b=-31.9
b=-31.9/-1.1
b=28+1/1
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