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-7.81+10.4b=11.5b
We move all terms to the left:
-7.81+10.4b-(11.5b)=0
We add all the numbers together, and all the variables
10.4b-(+11.5b)-7.81=0
We get rid of parentheses
10.4b-11.5b-7.81=0
We add all the numbers together, and all the variables
-1.1b-7.81=0
We move all terms containing b to the left, all other terms to the right
-1.1b=7.81
b=7.81/-1.1
b=-7+0.11/1.1
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