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8.1+10.89=7b
We move all terms to the left:
8.1+10.89-(7b)=0
We add all the numbers together, and all the variables
-7b+18.99=0
We move all terms containing b to the left, all other terms to the right
-7b=-18.99
b=-18.99/-7
b=2+2.5075376884422/3.5175879396985
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